diff --git a/Scripts/Misc/AOS.cs b/Scripts/Misc/AOS.cs
index 23c8fce1a..86b44e957 100644
--- a/Scripts/Misc/AOS.cs
+++ b/Scripts/Misc/AOS.cs
@@ -36,29 +36,23 @@ namespace Server
 
     public static int Damage(Mobile m, Mobile from, int damage, int phys, int fire, int cold, int pois, int nrgy)
     {
-      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy, 0, 0, false, false, false);
+      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy);
     }
 
     public static int Damage(Mobile m, Mobile from, int damage, int phys, int fire, int cold, int pois, int nrgy,
       int chaos)
     {
-      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy, chaos, 0, false, false, false);
-    }
-
-    public static int Damage(Mobile m, Mobile from, int damage, bool ignoreArmor, int phys, int fire, int cold, int pois,
-      int nrgy)
-    {
-      return Damage(m, from, damage, ignoreArmor, phys, fire, cold, pois, nrgy, 0, 0, false, false, false);
+      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy, chaos);
     }
 
     public static int Damage(Mobile m, Mobile from, int damage, int phys, int fire, int cold, int pois, int nrgy,
       bool keepAlive)
     {
-      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy, 0, 0, keepAlive, false, false);
+      return Damage(m, from, damage, false, phys, fire, cold, pois, nrgy, 0, 0, keepAlive);
     }
 
     public static int Damage(Mobile m, Mobile from, int damage, bool ignoreArmor, int phys, int fire, int cold, int pois,
-      int nrgy, int chaos, int direct, bool keepAlive, bool archer, bool deathStrike)
+      int nrgy, int chaos = 0, int direct = 0, bool keepAlive = false, bool archer = false, bool deathStrike = false)
     {
       if (m == null || m.Deleted || !m.Alive || damage <= 0)
         return 0;
diff --git a/Scripts/Mobiles/Animals/Mounts/LesserHiryu.cs b/Scripts/Mobiles/Animals/Mounts/LesserHiryu.cs
index 26233d2ab..32b83fdd4 100644
--- a/Scripts/Mobiles/Animals/Mounts/LesserHiryu.cs
+++ b/Scripts/Mobiles/Animals/Mounts/LesserHiryu.cs
@@ -138,7 +138,7 @@ namespace Server.Mobiles
       AddLoot(LootPack.Gems, 4);
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       double tamingChance = base.GetControlChance(m, useBaseSkill);
 
diff --git a/Scripts/Mobiles/Animals/Mounts/Ridgeback.cs b/Scripts/Mobiles/Animals/Mounts/Ridgeback.cs
index cc990bc7f..6ee813222 100644
--- a/Scripts/Mobiles/Animals/Mounts/Ridgeback.cs
+++ b/Scripts/Mobiles/Animals/Mounts/Ridgeback.cs
@@ -57,7 +57,7 @@ namespace Server.Mobiles
       return true;
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       return 1.0;
     }
diff --git a/Scripts/Mobiles/Animals/Mounts/SavageRidgeback.cs b/Scripts/Mobiles/Animals/Mounts/SavageRidgeback.cs
index c66355aa2..b63763ce3 100644
--- a/Scripts/Mobiles/Animals/Mounts/SavageRidgeback.cs
+++ b/Scripts/Mobiles/Animals/Mounts/SavageRidgeback.cs
@@ -57,7 +57,7 @@ namespace Server.Mobiles
       return true;
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       return 1.0;
     }
diff --git a/Scripts/Mobiles/Animals/Mounts/ScaledSwampDragon.cs b/Scripts/Mobiles/Animals/Mounts/ScaledSwampDragon.cs
index 6931c6e84..b92069e95 100644
--- a/Scripts/Mobiles/Animals/Mounts/ScaledSwampDragon.cs
+++ b/Scripts/Mobiles/Animals/Mounts/ScaledSwampDragon.cs
@@ -55,7 +55,7 @@ namespace Server.Mobiles
       return true;
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       return 1.0;
     }
diff --git a/Scripts/Mobiles/Animals/Mounts/SwampDragon.cs b/Scripts/Mobiles/Animals/Mounts/SwampDragon.cs
index e6786bb0c..1ee7989c8 100644
--- a/Scripts/Mobiles/Animals/Mounts/SwampDragon.cs
+++ b/Scripts/Mobiles/Animals/Mounts/SwampDragon.cs
@@ -168,7 +168,7 @@ namespace Server.Mobiles
       return 0x2C8;
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       return 1.0;
     }
diff --git a/Scripts/Mobiles/Monsters/SE/FireBeetle.cs b/Scripts/Mobiles/Monsters/SE/FireBeetle.cs
index bab9cddea..56977f459 100644
--- a/Scripts/Mobiles/Monsters/SE/FireBeetle.cs
+++ b/Scripts/Mobiles/Monsters/SE/FireBeetle.cs
@@ -99,7 +99,7 @@ namespace Server.Mobiles
       return 0x21D;
     }
 
-    public override double GetControlChance(Mobile m, bool useBaseSkill)
+    public override double GetControlChance(Mobile m, bool useBaseSkill = false)
     {
       return 1.0;
     }
diff --git a/Scripts/Mobiles/Vendors/NPC/Weaponsmith.cs b/Scripts/Mobiles/Vendors/NPC/Weaponsmith.cs
index a309283a3..47a0445b4 100644
--- a/Scripts/Mobiles/Vendors/NPC/Weaponsmith.cs
+++ b/Scripts/Mobiles/Vendors/NPC/Weaponsmith.cs
@@ -66,9 +66,7 @@ namespace Server.Mobiles
 
     public override Item CreateBulkOrder(Mobile from, bool fromContextMenu)
     {
-      PlayerMobile pm = from as PlayerMobile;
-
-      if (pm != null && pm.NextSmithBulkOrder == TimeSpan.Zero && (fromContextMenu || 0.2 > Utility.RandomDouble()))
+      if (from is PlayerMobile pm && pm.NextSmithBulkOrder == TimeSpan.Zero && (fromContextMenu || 0.2 > Utility.RandomDouble()))
       {
         double theirSkill = pm.Skills[SkillName.Blacksmith].Base;
 
@@ -100,16 +98,16 @@ namespace Server.Mobiles
 
     public override TimeSpan GetNextBulkOrder(Mobile from)
     {
-      if (from is PlayerMobile)
-        return ((PlayerMobile)from).NextSmithBulkOrder;
+      if (from is PlayerMobile mobile)
+        return mobile.NextSmithBulkOrder;
 
       return TimeSpan.Zero;
     }
 
     public override void OnSuccessfulBulkOrderReceive(Mobile from)
     {
-      if (Core.SE && from is PlayerMobile)
-        ((PlayerMobile)from).NextSmithBulkOrder = TimeSpan.Zero;
+      if (Core.SE && from is PlayerMobile mobile)
+        mobile.NextSmithBulkOrder = TimeSpan.Zero;
     }
 
     #endregion
diff --git a/Scripts/Mobiles/Vendors/NPC/Weaver.cs b/Scripts/Mobiles/Vendors/NPC/Weaver.cs
index 34a6de815..ba5c8f2d9 100644
--- a/Scripts/Mobiles/Vendors/NPC/Weaver.cs
+++ b/Scripts/Mobiles/Vendors/NPC/Weaver.cs
@@ -47,9 +47,7 @@ namespace Server.Mobiles
 
     public override Item CreateBulkOrder(Mobile from, bool fromContextMenu)
     {
-      PlayerMobile pm = from as PlayerMobile;
-
-      if (pm != null && pm.NextTailorBulkOrder == TimeSpan.Zero && (fromContextMenu || 0.2 > Utility.RandomDouble()))
+      if (from is PlayerMobile pm && pm.NextTailorBulkOrder == TimeSpan.Zero && (fromContextMenu || 0.2 > Utility.RandomDouble()))
       {
         double theirSkill = pm.Skills[SkillName.Tailoring].Base;
 
@@ -81,16 +79,16 @@ namespace Server.Mobiles
 
     public override TimeSpan GetNextBulkOrder(Mobile from)
     {
-      if (from is PlayerMobile)
-        return ((PlayerMobile)from).NextTailorBulkOrder;
+      if (from is PlayerMobile mobile)
+        return mobile.NextTailorBulkOrder;
 
       return TimeSpan.Zero;
     }
 
     public override void OnSuccessfulBulkOrderReceive(Mobile from)
     {
-      if (Core.SE && from is PlayerMobile)
-        ((PlayerMobile)from).NextTailorBulkOrder = TimeSpan.Zero;
+      if (Core.SE && from is PlayerMobile mobile)
+        mobile.NextTailorBulkOrder = TimeSpan.Zero;
     }
 
     #endregion
diff --git a/Scripts/Mobiles/Vendors/PlayerBarkeeper.cs b/Scripts/Mobiles/Vendors/PlayerBarkeeper.cs
index 9561a5db0..7a7c6dc65 100644
--- a/Scripts/Mobiles/Vendors/PlayerBarkeeper.cs
+++ b/Scripts/Mobiles/Vendors/PlayerBarkeeper.cs
@@ -309,33 +309,31 @@ namespace Server.Mobiles
 
     public override bool CheckGold(Mobile from, Item dropped)
     {
-      if (dropped is Gold)
+      if (!(dropped is Gold g))
+        return false;
+      
+      if (g.Amount > 50)
       {
-        Gold g = (Gold)dropped;
+        PrivateOverheadMessage(MessageType.Regular, 0x3B2, false, "I cannot accept so large a tip!",
+          from.NetState);
+      }
+      else
+      {
+        string tip = TipMessage;
 
-        if (g.Amount > 50)
+        if (tip == null || (tip = tip.Trim()).Length == 0)
         {
-          PrivateOverheadMessage(MessageType.Regular, 0x3B2, false, "I cannot accept so large a tip!",
+          PrivateOverheadMessage(MessageType.Regular, 0x3B2, false,
+            "It would not be fair of me to take your money and not offer you information in return.",
             from.NetState);
         }
         else
         {
-          string tip = TipMessage;
+          Direction = GetDirectionTo(from);
+          PrivateOverheadMessage(MessageType.Regular, 0x3B2, false, tip, from.NetState);
 
-          if (tip == null || (tip = tip.Trim()).Length == 0)
-          {
-            PrivateOverheadMessage(MessageType.Regular, 0x3B2, false,
-              "It would not be fair of me to take your money and not offer you information in return.",
-              from.NetState);
-          }
-          else
-          {
-            Direction = GetDirectionTo(from);
-            PrivateOverheadMessage(MessageType.Regular, 0x3B2, false, tip, from.NetState);
-
-            g.Delete();
-            return true;
-          }
+          g.Delete();
+          return true;
         }
       }
 
diff --git a/Scripts/Mobiles/Vendors/PlayerVendor.cs b/Scripts/Mobiles/Vendors/PlayerVendor.cs
index 8d2b15988..3a3da61ce 100644
--- a/Scripts/Mobiles/Vendors/PlayerVendor.cs
+++ b/Scripts/Mobiles/Vendors/PlayerVendor.cs
@@ -107,9 +107,9 @@ namespace Server.Mobiles
         return false;
       }
 
-      if (!BaseHouse.NewVendorSystem && Parent is PlayerVendor)
+      if (!BaseHouse.NewVendorSystem && Parent is PlayerVendor vendor)
       {
-        BaseHouse house = ((PlayerVendor)Parent).House;
+        BaseHouse house = vendor.House;
 
         if (house != null && house.IsAosRules && !house.CheckAosStorage(1 + item.TotalItems + plusItems))
         {
@@ -155,9 +155,7 @@ namespace Server.Mobiles
     {
       base.GetChildContextMenuEntries(from, list, item);
 
-      PlayerVendor pv = RootParent as PlayerVendor;
-
-      if (pv == null || pv.IsOwner(from))
+      if (!(RootParent is PlayerVendor pv) || pv.IsOwner(from))
         return;
 
       VendorItem vi = pv.GetVendorItem(item);
@@ -199,10 +197,8 @@ namespace Server.Mobiles
 
     public override void OnSingleClickContained(Mobile from, Item item)
     {
-      if (RootParent is PlayerVendor)
+      if (RootParent is PlayerVendor vendor)
       {
-        PlayerVendor vendor = (PlayerVendor)RootParent;
-
         VendorItem vi = vendor.GetVendorItem(item);
 
         if (vi != null)
@@ -985,9 +981,7 @@ namespace Server.Mobiles
 
     public static void TryToBuy(Item item, Mobile from)
     {
-      PlayerVendor vendor = item.RootParent as PlayerVendor;
-
-      if (vendor == null || !vendor.CanInteractWith(from, false))
+      if (!(item.RootParent is PlayerVendor vendor) || !vendor.CanInteractWith(from, false))
         return;
 
       if (vendor.IsOwner(from))
@@ -1330,7 +1324,8 @@ namespace Server.Mobiles
 
       protected override void OnTarget(Mobile from, object targeted)
       {
-        if (targeted is Item) TryToBuy((Item)targeted, from);
+        if (targeted is Item item)
+          TryToBuy(item, from);
       }
     }
 
@@ -1358,10 +1353,9 @@ namespace Server.Mobiles
         else
           firstWord = text;
 
-        int price;
         string description;
 
-        if (int.TryParse(firstWord, out price))
+        if (int.TryParse(firstWord, out int price))
         {
           if (sep >= 0)
             description = text.Substring(sep + 1).Trim();
@@ -1397,7 +1391,7 @@ namespace Server.Mobiles
 
           if (item is Container)
           {
-            if (item is LockableContainer && ((LockableContainer)item).Locked)
+            if (item is LockableContainer container && container.Locked)
               m_Vendor.SayTo(from, 1043298); // Locked items may not be made not-for-sale.
             else if (item.Items.Count > 0)
               m_Vendor.SayTo(from, 1043299); // To be not for sale, all items in a container must be for sale.
@@ -1448,9 +1442,7 @@ namespace Server.Mobiles
 
         text = text.Trim();
 
-        int amount;
-
-        if (!int.TryParse(text, out amount))
+        if (!int.TryParse(text, out int amount))
           amount = 0;
 
         GiveGold(from, amount);
diff --git a/Scripts/Multis/BaseHouse.cs b/Scripts/Multis/BaseHouse.cs
index 5868e2285..681405edf 100644
--- a/Scripts/Multis/BaseHouse.cs
+++ b/Scripts/Multis/BaseHouse.cs
@@ -110,9 +110,7 @@ namespace Server.Multis
         if (m_Owner == null)
           return Core.AOS ? DecayType.Condemned : DecayType.ManualRefresh;
 
-        Account acct = m_Owner.Account as Account;
-
-        if (acct == null)
+        if (!(m_Owner.Account is Account acct))
           return Core.AOS ? DecayType.Condemned : DecayType.ManualRefresh;
 
         if (acct.AccessLevel >= AccessLevel.GameMaster)
@@ -751,17 +749,18 @@ namespace Server.Multis
         if (!addon.Deleted)
         {
           Item deed = null;
-          bool retainDeedHue = false; //if the items aren't hued but the deed itself is
+          bool retainDeedHue = false; // if the items aren't hued but the deed itself is
           int hue = 0;
 
-          if (addon is IAddon)
-          {
-            deed = ((IAddon)addon).Deed;
+          BaseAddon ba = addon as BaseAddon;
 
-            if (addon is BaseAddon && ((BaseAddon)addon).RetainDeedHue
-            ) //There are things that are IAddon which aren't BaseAddon
+          if (addon is IAddon baseAddon)
+          {
+            deed = baseAddon.Deed;
+
+            // There are things that are IAddon which aren't BaseAddon
+            if (ba?.RetainDeedHue == true)
             {
-              BaseAddon ba = (BaseAddon)addon;
               retainDeedHue = true;
 
               for (int i = 0; hue == 0 && i < ba.Components.Count; ++i)
@@ -778,16 +777,14 @@ namespace Server.Multis
           {
             #region Mondain's Legacy
 
-            if (deed is BaseAddonContainerDeed && addon is BaseAddonContainer)
+            if (deed is BaseAddonContainerDeed containerDeed && addon is BaseAddonContainer c)
             {
-              BaseAddonContainer c = (BaseAddonContainer)addon;
               c.DropItemsToGround();
-
-              ((BaseAddonContainerDeed)deed).Resource = c.Resource;
+              containerDeed.Resource = c.Resource;
             }
-            else if (deed is BaseAddonDeed && addon is BaseAddon)
+            else if (deed is BaseAddonDeed addonDeed && ba != null)
             {
-              ((BaseAddonDeed)deed).Resource = ((BaseAddon)addon).Resource;
+              addonDeed.Resource = ba.Resource;
             }
 
             #endregion
@@ -874,10 +871,10 @@ namespace Server.Multis
 
         RelocatedEntities.Add(relocEntity);
 
-        if (entity is Item)
-          ((Item)entity).Internalize();
-        else
-          ((Mobile)entity).Internalize();
+        if (entity is Item item)
+          item.Internalize();
+        else if (entity is Mobile mobile)
+          mobile.Internalize();
       }
     }
 
@@ -889,15 +886,14 @@ namespace Server.Multis
         Point3D location = new Point3D(relLoc.X + X, relLoc.Y + Y, relLoc.Z + Z);
 
         IEntity entity = relocEntity.Entity;
-        if (entity is Item)
+        if (entity is Item item)
         {
-          Item item = (Item)entity;
-
           if (!item.Deleted)
           {
-            if (item is IAddon)
+            IAddon addon = item as IAddon;
+            if (addon != null)
             {
-              if (((IAddon)item).CouldFit(location, Map))
+              if (addon.CouldFit(location, Map))
               {
                 item.MoveToWorld(location, Map);
                 continue;
@@ -939,19 +935,18 @@ namespace Server.Multis
 
               Item relocateItem = item;
 
-              if (item is StrongBox)
-                relocateItem = ((StrongBox)item).ConvertToStandardContainer();
+              if (item is StrongBox box)
+                relocateItem = box.ConvertToStandardContainer();
 
-              if (item is IAddon)
+              if (addon != null)
               {
-                Item deed = ((IAddon)item).Deed;
+                Item deed = addon.Deed;
                 bool retainDeedHue = false; //if the items aren't hued but the deed itself is
                 int hue = 0;
 
-                if (item is BaseAddon && ((BaseAddon)item).RetainDeedHue
+                if (item is BaseAddon ba && ba.RetainDeedHue
                 ) //There are things that are IAddon which aren't BaseAddon
                 {
-                  BaseAddon ba = (BaseAddon)item;
                   retainDeedHue = true;
 
                   for (int i = 0; hue == 0 && i < ba.Components.Count; ++i)
@@ -967,17 +962,14 @@ namespace Server.Multis
 
                 if (deed != null)
                 {
-                  if (deed is BaseAddonContainerDeed && item is BaseAddonContainer)
+                  if (deed is BaseAddonContainerDeed containerDeed && item is BaseAddonContainer c)
                   {
-                    BaseAddonContainer c = (BaseAddonContainer)item;
                     c.DropItemsToGround();
 
-                    ((BaseAddonContainerDeed)deed).Resource = c.Resource;
-                  }
-                  else if (deed is BaseAddonDeed && item is BaseAddon)
-                  {
-                    ((BaseAddonDeed)deed).Resource = ((BaseAddon)item).Resource;
+                    containerDeed.Resource = c.Resource;
                   }
+                  else if (deed is BaseAddonDeed addonDeed && item is BaseAddon baseAddon)
+                    addonDeed.Resource = baseAddon.Resource;
 
                   if (retainDeedHue)
                     deed.Hue = hue;
@@ -1004,17 +996,12 @@ namespace Server.Multis
             if (((SecureInfo)Secures[i]).Item == item)
               Secures.RemoveAt(i);
         }
-        else
+        else if (entity is Mobile mobile && !mobile.Deleted)
         {
-          Mobile mobile = (Mobile)entity;
-
-          if (!mobile.Deleted)
-          {
-            if (Map.CanFit(location, 16, false, false))
-              mobile.MoveToWorld(location, Map);
-            else
-              InternalizedVendors.Add(mobile);
-          }
+          if (Map.CanFit(location, 16, false, false))
+            mobile.MoveToWorld(location, Map);
+          else
+            InternalizedVendors.Add(mobile);
         }
       }
 
@@ -1212,9 +1199,7 @@ namespace Server.Multis
 
       for (int i = 0; i < sector.Multis.Count; ++i)
       {
-        BaseHouse house = sector.Multis[i] as BaseHouse;
-
-        if (house != null && house.IsInside(loc, height))
+        if (sector.Multis[i] is BaseHouse house && house.IsInside(loc, height))
           return house;
       }
 
@@ -1254,8 +1239,8 @@ namespace Server.Multis
         return true;
       if (item is Runebook)
         return true;
-      if (item is ISecurable)
-        return HasSecureAccess(from, ((ISecurable)item).Level);
+      if (item is ISecurable securable)
+        return HasSecureAccess(from, securable.Level);
       if (item is Container)
         return IsCoOwner(from);
       if (item.Stackable)
@@ -1264,8 +1249,6 @@ namespace Server.Multis
         return IsFriend(from);
       if (item is PotionKeg)
         return IsFriend(from);
-      if (item is BaseBoard)
-        return true;
       if (item is Dices)
         return true;
       if (item is RecallRune)
@@ -1276,7 +1259,7 @@ namespace Server.Multis
         return true;
       if (item is BaseInstrument)
         return true;
-      if (item is Dyes || item is DyeTub)
+      if (item is Dyes)
         return true;
       if (item is VendorRentalContract)
         return true;
@@ -1358,10 +1341,10 @@ namespace Server.Multis
           item.Map = Map;
 
       foreach (IEntity entity in GetHouseEntities())
-        if (entity is Item)
-          ((Item)entity).Map = Map;
-        else
-          ((Mobile)entity).Map = Map;
+        if (entity is Item item)
+          item.Map = Map;
+        else if (entity is Mobile mobile)
+          mobile.Map = Map;
     }
 
     public virtual void ChangeSignType(int itemID)
@@ -1408,10 +1391,10 @@ namespace Server.Multis
       {
         Point3D newLocation = new Point3D(entity.X + x, entity.Y + y, entity.Z + z);
 
-        if (entity is Item)
-          ((Item)entity).Location = newLocation;
-        else
-          ((Mobile)entity).Location = newLocation;
+        if (entity is Item item)
+          item.Location = newLocation;
+        else if (entity is Mobile mobile)
+          mobile.Location = newLocation;
       }
     }
 
@@ -1499,7 +1482,7 @@ namespace Server.Multis
       AddDoor(westDoor, x, y, z);
       AddDoor(eastDoor, x + 1, y, z);
 
-      return new BaseDoor[2] { westDoor, eastDoor };
+      return new BaseDoor[] { westDoor, eastDoor };
     }
 
     public uint CreateKeys(Mobile m)
@@ -1544,7 +1527,7 @@ namespace Server.Multis
       AddDoor(westDoor, x, y, z);
       AddDoor(eastDoor, x + 1, y, z);
 
-      return new BaseDoor[2] { westDoor, eastDoor };
+      return new BaseDoor[] { westDoor, eastDoor };
     }
 
     public BaseDoor MakeDoor(bool wood, DoorFacing facing)
@@ -1583,9 +1566,7 @@ namespace Server.Multis
 
       if (m_Trash == null || m_Trash.Deleted)
       {
-        m_Trash = new TrashBarrel();
-
-        m_Trash.Movable = false;
+        m_Trash = new TrashBarrel { Movable = false };
         m_Trash.MoveToWorld(from.Location, from.Map);
 
         from.SendLocalizedMessage(502121); /* You have a new trash barrel.
@@ -1604,25 +1585,16 @@ namespace Server.Multis
       Sign.MoveToWorld(new Point3D(X + xoff, Y + yoff, Z + zoff), Map);
     }
 
-    private void SetLockdown(Item i, bool locked)
-    {
-      SetLockdown(i, locked, false);
-    }
-
-    private void SetLockdown(Item i, bool locked, bool checkContains)
+    private void SetLockdown(Item i, bool locked, bool checkContains = false)
     {
       if (LockDowns == null)
         return;
 
-      #region Mondain's Legacy
-
       if (i is BaseAddonContainer)
         i.Movable = false;
       else
-
-        #endregion
-
         i.Movable = !locked;
+      
       i.IsLockedDown = locked;
 
       if (locked)
@@ -1976,12 +1948,9 @@ namespace Server.Multis
       {
         AggressorInfo info = m.Aggressed[i];
 
-        Guild attackerGuild = m.Guild as Guild;
-        Guild defenderGuild = info.Defender.Guild as Guild;
-
         if (info.Defender.Player && info.Defender.Alive &&
             DateTime.UtcNow - info.LastCombatTime < HouseRegion.CombatHeatDelay &&
-            (attackerGuild == null || defenderGuild == null ||
+            (!(m.Guild is Guild attackerGuild) || !(info.Defender.Guild is Guild defenderGuild) ||
              defenderGuild != attackerGuild && !defenderGuild.IsEnemy(attackerGuild)))
           return true;
       }
@@ -2063,7 +2032,7 @@ namespace Server.Multis
       {
         Container c = info.Item;
 
-        if (!c.Deleted && c is StrongBox && ((StrongBox)c).Owner == from)
+        if (!c.Deleted && c is StrongBox box && box.Owner == from)
         {
           from.SendLocalizedMessage(502112); //You already have a strong box
           return;
@@ -2086,10 +2055,7 @@ namespace Server.Multis
           }
       }
 
-      StrongBox sb = new StrongBox(from, this);
-      sb.Movable = false;
-      sb.IsLockedDown = false;
-      sb.IsSecure = true;
+      StrongBox sb = new StrongBox(from, this) { Movable = false, IsLockedDown = false, IsSecure = true };
       Secures.Add(new SecureInfo(sb, SecureLevel.CoOwners));
       sb.MoveToWorld(from.Location, from.Map);
     }
@@ -2115,7 +2081,7 @@ namespace Server.Multis
       {
         from.SendLocalizedMessage(501352); // You may not eject someone who is not in your house!
       }
-      else if (targ is BaseCreature && ((BaseCreature)targ).NoHouseRestrictions)
+      else if (targ is BaseCreature creature && creature.NoHouseRestrictions)
       {
         from.SendLocalizedMessage(501347); // You cannot eject that from the house!
       }
@@ -2196,7 +2162,7 @@ namespace Server.Multis
         from.SendLocalizedMessage(
           1062521); // You cannot ban someone from a private house.  Revoke their access instead.
       }
-      else if (targ is BaseCreature && ((BaseCreature)targ).NoHouseRestrictions)
+      else if (targ is BaseCreature bc && bc.NoHouseRestrictions)
       {
         from.SendLocalizedMessage(1062040); // You cannot ban that.
       }
@@ -2296,12 +2262,12 @@ namespace Server.Multis
         {
           Container c = info.Item;
 
-          if (c is StrongBox && ((StrongBox)c).Owner == targ)
+          if (c is StrongBox box && box.Owner == targ)
           {
-            c.IsLockedDown = false;
-            c.IsSecure = false;
+            box.IsLockedDown = false;
+            box.IsSecure = false;
             Secures.Remove(info);
-            c.Destroy();
+            box.Destroy();
             break;
           }
         }
@@ -2452,9 +2418,8 @@ namespace Server.Multis
       {
         Item item = (Item)LockDowns[i];
 
-        if (item is Container && !(item is BaseBoard || item is Aquarium || item is FishBowl))
+        if (item is Container cont && !(cont is BaseBoard || cont is Aquarium || cont is FishBowl))
         {
-          Container cont = (Container)item;
           List<Item> children = cont.Items;
 
           for (int j = 0; j < children.Count; ++j)
@@ -2640,9 +2605,7 @@ namespace Server.Multis
 
             for (int i = 0; i < items.Count; ++i)
             {
-              Container c = items[i] as Container;
-
-              if (c != null)
+              if (items[i] is Container c)
               {
                 c.IsSecure = true;
                 Secures.Add(new SecureInfo(c, SecureLevel.CoOwners));
@@ -2888,16 +2851,15 @@ namespace Server.Multis
 
           if (item != null)
           {
-            if (!item.Deleted && item is IAddon)
+            if (!item.Deleted && item is IAddon addon)
             {
-              Item deed = ((IAddon)item).Deed;
+              Item deed = addon.Deed;
               bool retainDeedHue = false; //if the items aren't hued but the deed itself is
               int hue = 0;
 
-              if (item is BaseAddon && ((BaseAddon)item).RetainDeedHue
+              if (addon is BaseAddon ba && ba.RetainDeedHue
               ) //There are things that are IAddon which aren't BaseAddon
               {
-                BaseAddon ba = (BaseAddon)item;
                 retainDeedHue = true;
 
                 for (int j = 0; hue == 0 && j < ba.Components.Count; ++j)
@@ -2959,9 +2921,7 @@ namespace Server.Multis
 
     public static bool HasAccountHouse(Mobile m)
     {
-      Account a = m.Account as Account;
-
-      if (a == null)
+      if (!(m.Account is Account a))
         return false;
 
       for (int i = 0; i < a.Length; ++i)
@@ -3009,9 +2969,7 @@ namespace Server.Multis
 
         for (int i = 0; keyValue == 0 && i < Doors.Count; ++i)
         {
-          BaseDoor door = Doors[i] as BaseDoor;
-
-          if (door != null)
+          if (Doors[i] is BaseDoor door)
             keyValue = door.KeyValue;
         }
 
@@ -3026,9 +2984,7 @@ namespace Server.Multis
       if (Doors != null)
         for (int i = 0; i < Doors.Count; ++i)
         {
-          BaseDoor door = Doors[i] as BaseDoor;
-
-          if (door != null)
+          if (Doors[i] is BaseDoor door)
             door.KeyValue = keyValue;
         }
     }
@@ -3038,9 +2994,7 @@ namespace Server.Multis
       if (Doors != null)
         for (int i = 0; i < Doors.Count; ++i)
         {
-          BaseDoor door = Doors[i] as BaseDoor;
-
-          if (door != null)
+          if (Doors[i] is BaseDoor door)
           {
             door.KeyValue = 0;
             door.Locked = false;
@@ -3075,9 +3029,7 @@ namespace Server.Multis
         if (c == m)
           return true;
 
-        Account bannedAccount = c.Account as Account;
-
-        if (bannedAccount != null && bannedAccount == theirAccount)
+        if (c.Account is Account bannedAccount && bannedAccount == theirAccount)
           return true;
       }
 
@@ -3092,10 +3044,8 @@ namespace Server.Multis
       if (m.AccessLevel > AccessLevel.Player || IsFriend(m) || Access != null && Access.Contains(m))
         return true;
 
-      if (m is BaseCreature)
+      if (m is BaseCreature bc)
       {
-        BaseCreature bc = (BaseCreature)m;
-
         if (bc.NoHouseRestrictions)
           return true;
 
@@ -3425,57 +3375,43 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsCoOwner(from))
         return;
 
-      if (targeted is Item)
+      if (targeted is Item item)
       {
         if (m_Release)
         {
-          #region Mondain's legacy
-
-          if (targeted is AddonContainerComponent)
+          if (item is AddonContainerComponent component)
           {
-            AddonContainerComponent component = (AddonContainerComponent)targeted;
-
             if (component.Addon != null)
               m_House.Release(from, component.Addon);
           }
           else
-
-            #endregion
-
           {
-            m_House.Release(from, (Item)targeted);
+            m_House.Release(from, item);
           }
         }
         else
         {
-          if (targeted is VendorRentalContract)
+          if (item is VendorRentalContract)
           {
             from.LocalOverheadMessage(MessageType.Regular, 0x3B2,
               1062392); // You must double click the contract in your pack to lock it down.
             from.LocalOverheadMessage(MessageType.Regular, 0x3B2, 501732); // I cannot lock this down!
           }
-          else if ((Item)targeted is AddonComponent)
+          else if (item is AddonComponent)
           {
             from.LocalOverheadMessage(MessageType.Regular, 0x3E9, 501727); // You cannot lock that down!
             from.LocalOverheadMessage(MessageType.Regular, 0x3E9, 501732); // I cannot lock this down!
           }
           else
           {
-            #region Mondain's legacy
-
-            if (targeted is AddonContainerComponent)
+            if (item is AddonContainerComponent component)
             {
-              AddonContainerComponent component = (AddonContainerComponent)targeted;
-
               if (component.Addon != null)
                 m_House.LockDown(from, component.Addon);
             }
             else
-
-              #endregion
-
             {
-              m_House.LockDown(from, (Item)targeted);
+              m_House.LockDown(from, item);
             }
           }
         }
@@ -3513,30 +3449,23 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsCoOwner(from))
         return;
 
-      if (targeted is Item)
+      if (targeted is Item item)
       {
         if (m_Release)
         {
-          #region Mondain's legacy
-
-          if (targeted is AddonContainerComponent)
+          if (item is AddonContainerComponent component)
           {
-            AddonContainerComponent component = (AddonContainerComponent)targeted;
-
             if (component.Addon != null)
               m_House.ReleaseSecure(from, component.Addon);
           }
           else
-
-            #endregion
-
           {
-            m_House.ReleaseSecure(from, (Item)targeted);
+            m_House.ReleaseSecure(from, item);
           }
         }
         else
         {
-          if (targeted is VendorRentalContract)
+          if (item is VendorRentalContract)
           {
             from.LocalOverheadMessage(MessageType.Regular, 0x3B2,
               1062392); // You must double click the contract in your pack to lock it down.
@@ -3544,21 +3473,14 @@ namespace Server.Multis
           }
           else
           {
-            #region Mondain's legacy
-
-            if (targeted is AddonContainerComponent)
+            if (item is AddonContainerComponent component)
             {
-              AddonContainerComponent component = (AddonContainerComponent)targeted;
-
               if (component.Addon != null)
                 m_House.AddSecure(from, component.Addon);
             }
             else
-
-              #endregion
-
             {
-              m_House.AddSecure(from, (Item)targeted);
+              m_House.AddSecure(from, item);
             }
           }
         }
@@ -3586,8 +3508,8 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsFriend(from))
         return;
 
-      if (targeted is Mobile)
-        m_House.Kick(from, (Mobile)targeted);
+      if (targeted is Mobile mobile)
+        m_House.Kick(from, mobile);
       else
         from.SendLocalizedMessage(501347); //You cannot eject that from the house!
     }
@@ -3611,12 +3533,12 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsFriend(from))
         return;
 
-      if (targeted is Mobile)
+      if (targeted is Mobile mobile)
       {
         if (m_Banning)
-          m_House.Ban(from, (Mobile)targeted);
+          m_House.Ban(from, mobile);
         else
-          m_House.RemoveBan(from, (Mobile)targeted);
+          m_House.RemoveBan(from, mobile);
       }
       else
       {
@@ -3641,8 +3563,8 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsFriend(from))
         return;
 
-      if (targeted is Mobile)
-        m_House.GrantAccess(from, (Mobile)targeted);
+      if (targeted is Mobile mobile)
+        m_House.GrantAccess(from, mobile);
       else
         from.SendLocalizedMessage(1060712); // That is not a player.
     }
@@ -3666,12 +3588,12 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsOwner(from))
         return;
 
-      if (targeted is Mobile)
+      if (targeted is Mobile mobile)
       {
         if (m_Add)
-          m_House.AddCoOwner(from, (Mobile)targeted);
+          m_House.AddCoOwner(from, mobile);
         else
-          m_House.RemoveCoOwner(from, (Mobile)targeted);
+          m_House.RemoveCoOwner(from, mobile);
       }
       else
       {
@@ -3698,12 +3620,12 @@ namespace Server.Multis
       if (!from.Alive || m_House.Deleted || !m_House.IsCoOwner(from))
         return;
 
-      if (targeted is Mobile)
+      if (targeted is Mobile mobile)
       {
         if (m_Add)
-          m_House.AddFriend(from, (Mobile)targeted);
+          m_House.AddFriend(from, mobile);
         else
-          m_House.RemoveFriend(from, (Mobile)targeted);
+          m_House.RemoveFriend(from, mobile);
       }
       else
       {
@@ -3725,8 +3647,8 @@ namespace Server.Multis
 
     protected override void OnTarget(Mobile from, object targeted)
     {
-      if (targeted is Mobile)
-        m_House.BeginConfirmTransfer(from, (Mobile)targeted);
+      if (targeted is Mobile mobile)
+        m_House.BeginConfirmTransfer(from, mobile);
       else
         from.SendLocalizedMessage(501384); // Only a player can own a house!
     }
@@ -3759,7 +3681,7 @@ namespace Server.Multis
         bool isOwned = house.Doors.Contains(item);
 
         if (!isOwned)
-          isOwned = house is HouseFoundation && ((HouseFoundation)house).IsFixture(item);
+          isOwned = house is HouseFoundation foundation && foundation.IsFixture(item);
 
         if (!isOwned)
           isOwned = house.HasLockedDownItem(item);
diff --git a/Scripts/Multis/Boats/BaseBoat.cs b/Scripts/Multis/Boats/BaseBoat.cs
index 473ebbfd5..0abdd4d92 100644
--- a/Scripts/Multis/Boats/BaseBoat.cs
+++ b/Scripts/Multis/Boats/BaseBoat.cs
@@ -231,9 +231,7 @@ namespace Server.Multis
 
       for (int i = 0; i < sector.Multis.Count; i++)
       {
-        BaseBoat boat = sector.Multis[i] as BaseBoat;
-
-        if (boat != null && boat.Contains(loc.X, loc.Y))
+        if (sector.Multis[i] is BaseBoat boat && boat.Contains(loc.X, loc.Y))
           return boat;
       }
 
@@ -1521,19 +1519,15 @@ namespace Server.Multis
         }
 
         foreach (IEntity e in toMove)
-          if (e is Item)
+          if (e is Item item)
           {
-            Item item = (Item)e;
-
             item.NoMoveHS = true;
 
             if (!(item is TillerMan || item is Hold || item is Plank))
               item.Location = new Point3D(item.X + xOffset, item.Y + yOffset, item.Z);
           }
-          else if (e is Mobile)
+          else if (e is Mobile m)
           {
-            Mobile m = (Mobile)e;
-
             m.NoMoveHS = true;
             m.Location = new Point3D(m.X + xOffset, m.Y + yOffset, m.Z);
           }
@@ -1542,10 +1536,10 @@ namespace Server.Multis
         Location = new Point3D(X + xOffset, Y + yOffset, Z);
 
         foreach (IEntity e in toMove)
-          if (e is Item)
-            ((Item)e).NoMoveHS = false;
-          else if (e is Mobile)
-            ((Mobile)e).NoMoveHS = false;
+          if (e is Item item)
+            item.NoMoveHS = false;
+          else if (e is Mobile mobile)
+            mobile.NoMoveHS = false;
 
         NoMoveHS = false;
       }
@@ -1567,16 +1561,12 @@ namespace Server.Multis
       {
         IEntity e = toMove[i];
 
-        if (e is Item)
+        if (e is Item item)
         {
-          Item item = (Item)e;
-
           item.Location = new Point3D(item.X + xOffset, item.Y + yOffset, item.Z + zOffset);
         }
-        else if (e is Mobile)
+        else if (e is Mobile m)
         {
-          Mobile m = (Mobile)e;
-
           m.Location = new Point3D(m.X + xOffset, m.Y + yOffset, m.Z + zOffset);
         }
       }
@@ -1595,23 +1585,19 @@ namespace Server.Multis
 
       MultiComponentList mcl = Components;
 
-      foreach (object o in map.GetObjectsInBounds(new Rectangle2D(X + mcl.Min.X, Y + mcl.Min.Y, mcl.Width, mcl.Height))
+      foreach (IEntity o in map.GetObjectsInBounds(new Rectangle2D(X + mcl.Min.X, Y + mcl.Min.Y, mcl.Width, mcl.Height))
       )
       {
         if (o == this || o is TillerMan || o is Hold || o is Plank)
           continue;
 
-        if (o is Item)
+        if (o is Item item)
         {
-          Item item = (Item)o;
-
           if (Contains(item) && item.Visible && item.Z >= Z)
             list.Add(item);
         }
-        else if (o is Mobile)
+        else if (o is Mobile m)
         {
-          Mobile m = (Mobile)o;
-
           if (Contains(m))
             list.Add(m);
         }
@@ -1679,16 +1665,12 @@ namespace Server.Multis
       {
         IEntity e = toMove[i];
 
-        if (e is Item)
+        if (e is Item item)
         {
-          Item item = (Item)e;
-
           item.Location = Rotate(item.Location, count);
         }
-        else if (e is Mobile)
+        else if (e is Mobile m)
         {
-          Mobile m = (Mobile)e;
-
           m.Direction = (m.Direction - old + facing) & Direction.Mask;
           m.Location = Rotate(m.Location, count);
         }
@@ -1894,10 +1876,8 @@ namespace Server.Multis
           m_Stream.Write((byte)0xF3);
           m_Stream.Write((short)0x1);
 
-          if (ent is BaseMulti)
+          if (ent is BaseMulti bm)
           {
-            BaseMulti bm = (BaseMulti)ent;
-
             m_Stream.Write((byte)0x02);
             m_Stream.Write(bm.Serial);
             // TODO: Mask no longer needed, merge with Item case?
@@ -1915,10 +1895,8 @@ namespace Server.Multis
             m_Stream.Write((short)bm.Hue);
             m_Stream.Write((byte)bm.GetPacketFlags());
           }
-          else if (ent is Mobile)
+          else if (ent is Mobile m)
           {
-            Mobile m = (Mobile)ent;
-
             m_Stream.Write((byte)0x01);
             m_Stream.Write(m.Serial);
             m_Stream.Write((short)m.Body);
@@ -1935,10 +1913,8 @@ namespace Server.Multis
             m_Stream.Write((short)m.Hue);
             m_Stream.Write((byte)m.GetPacketFlags());
           }
-          else if (ent is Item)
+          else if (ent is Item item)
           {
-            Item item = (Item)ent;
-
             m_Stream.Write((byte)0x00);
             m_Stream.Write(item.Serial);
             m_Stream.Write((ushort)(item.ItemID & 0xFFFF));
diff --git a/Scripts/Multis/Boats/BaseBoatDeed.cs b/Scripts/Multis/Boats/BaseBoatDeed.cs
index 5171d8c27..5509ccf9b 100644
--- a/Scripts/Multis/Boats/BaseBoatDeed.cs
+++ b/Scripts/Multis/Boats/BaseBoatDeed.cs
@@ -153,12 +153,10 @@ namespace Server.Multis
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D ip = o as IPoint3D;
-
-        if (ip != null)
+        if (o is IPoint3D ip)
         {
-          if (ip is Item)
-            ip = ((Item)ip).GetWorldTop();
+          if (ip is Item item)
+            ip = item.GetWorldTop();
 
           Point3D p = new Point3D(ip);
 
diff --git a/Scripts/Multis/Boats/BaseDockedBoat.cs b/Scripts/Multis/Boats/BaseDockedBoat.cs
index dbd03d0bc..3209e2061 100644
--- a/Scripts/Multis/Boats/BaseDockedBoat.cs
+++ b/Scripts/Multis/Boats/BaseDockedBoat.cs
@@ -172,12 +172,10 @@ namespace Server.Multis
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D ip = o as IPoint3D;
-
-        if (ip != null)
+        if (o is IPoint3D ip)
         {
-          if (ip is Item)
-            ip = ((Item)ip).GetWorldTop();
+          if (ip is Item item)
+            ip = item.GetWorldTop();
 
           Point3D p = new Point3D(ip);
 
diff --git a/Scripts/Multis/Boats/Strandedness.cs b/Scripts/Multis/Boats/Strandedness.cs
index f01c4b3c0..5f818ecee 100644
--- a/Scripts/Multis/Boats/Strandedness.cs
+++ b/Scripts/Multis/Boats/Strandedness.cs
@@ -97,17 +97,17 @@ namespace Server.Misc
 
       object surface = map.GetTopSurface(from.Location);
 
-      if (surface is LandTile)
+      if (surface is LandTile tile)
       {
-        int id = ((LandTile)surface).ID;
+        int id = tile.ID;
 
         return id >= 168 && id <= 171
                || id >= 310 && id <= 311;
       }
 
-      if (surface is StaticTile)
+      if (surface is StaticTile staticTile)
       {
-        int id = ((StaticTile)surface).ID;
+        int id = staticTile.ID;
 
         return id >= 0x1796 && id <= 0x17B2;
       }
diff --git a/Scripts/Multis/Boats/TillerMan.cs b/Scripts/Multis/Boats/TillerMan.cs
index 1e9cb3014..fb90fb9f9 100644
--- a/Scripts/Multis/Boats/TillerMan.cs
+++ b/Scripts/Multis/Boats/TillerMan.cs
@@ -79,8 +79,8 @@ namespace Server.Items
 
     public override bool OnDragDrop(Mobile from, Item dropped)
     {
-      if (dropped is MapItem && m_Boat != null && m_Boat.CanCommand(from) && m_Boat.Contains(from))
-        m_Boat.AssociateMap((MapItem)dropped);
+      if (dropped is MapItem item && m_Boat != null && m_Boat.CanCommand(from) && m_Boat.Contains(from))
+        m_Boat.AssociateMap(item);
 
       return false;
     }
diff --git a/Scripts/Multis/Camps/BaseCamp.cs b/Scripts/Multis/Camps/BaseCamp.cs
index 6a8b0a727..84963f3e6 100644
--- a/Scripts/Multis/Camps/BaseCamp.cs
+++ b/Scripts/Multis/Camps/BaseCamp.cs
@@ -80,15 +80,14 @@ namespace Server.Multis
 
       int zavg = Map.GetAverageZ(X + xOffset, Y + yOffset);
       Point3D loc = new Point3D(X + xOffset, Y + yOffset, zavg + zOffset);
-      BaseCreature bc = m as BaseCreature;
 
-      if (bc != null)
+      if (m is BaseCreature bc)
       {
         bc.RangeHome = wanderRange;
         bc.Home = loc;
       }
 
-      if (m is BaseVendor || m is Banker)
+      if (m is BaseVendor)
         m.Direction = Direction.South;
 
       m.MoveToWorld(loc, Map);
diff --git a/Scripts/Multis/ComponentVerification.cs b/Scripts/Multis/ComponentVerification.cs
index 8cb79395a..62a47d1ee 100644
--- a/Scripts/Multis/ComponentVerification.cs
+++ b/Scripts/Multis/ComponentVerification.cs
@@ -235,8 +235,8 @@ namespace Server.Multis
 
     public int GetInt32(object obj)
     {
-      if (obj is int)
-        return (int)obj;
+      if (obj is int i)
+        return i;
 
       return 0;
     }
diff --git a/Scripts/Multis/Deeds.cs b/Scripts/Multis/Deeds.cs
index 05e2dbf58..f79408640 100644
--- a/Scripts/Multis/Deeds.cs
+++ b/Scripts/Multis/Deeds.cs
@@ -15,12 +15,10 @@ namespace Server.Multis.Deeds
 
     protected override void OnTarget(Mobile from, object o)
     {
-      IPoint3D ip = o as IPoint3D;
-
-      if (ip != null)
+      if (o is IPoint3D ip)
       {
-        if (ip is Item)
-          ip = ((Item)ip).GetWorldTop();
+        if (ip is Item item)
+          ip = item.GetWorldTop();
 
         Point3D p = new Point3D(ip);
 
@@ -139,9 +137,8 @@ namespace Server.Multis.Deeds
       }
       else
       {
-        ArrayList toMove;
         Point3D center = new Point3D(p.X - Offset.X, p.Y - Offset.Y, p.Z - Offset.Z);
-        HousePlacementResult res = HousePlacement.Check(from, MultiID, center, out toMove);
+        HousePlacementResult res = HousePlacement.Check(from, MultiID, center, out ArrayList toMove);
 
         switch (res)
         {
@@ -155,10 +152,10 @@ namespace Server.Multis.Deeds
             {
               object o = toMove[i];
 
-              if (o is Mobile)
-                ((Mobile)o).Location = house.BanLocation;
-              else if (o is Item)
-                ((Item)o).Location = house.BanLocation;
+              if (o is Mobile mobile)
+                mobile.Location = house.BanLocation;
+              else if (o is Item item)
+                item.Location = house.BanLocation;
             }
 
             break;
diff --git a/Scripts/Multis/HouseFoundation.cs b/Scripts/Multis/HouseFoundation.cs
index 06bd4ede1..05ba2511c 100644
--- a/Scripts/Multis/HouseFoundation.cs
+++ b/Scripts/Multis/HouseFoundation.cs
@@ -538,25 +538,19 @@ namespace Server.Multis
       {
         Item fixture = Fixtures[i];
 
-        if (fixture is HouseTeleporter)
+        if (fixture is HouseTeleporter tp)
         {
-          HouseTeleporter tp = (HouseTeleporter)fixture;
-
           for (int j = 1; j <= Fixtures.Count; ++j)
           {
-            HouseTeleporter check = Fixtures[(i + j) % Fixtures.Count] as HouseTeleporter;
-
-            if (check != null && check.ItemID == tp.ItemID)
+            if (Fixtures[(i + j) % Fixtures.Count] is HouseTeleporter check && check.ItemID == tp.ItemID)
             {
               tp.Target = check;
               break;
             }
           }
         }
-        else if (fixture is BaseHouseDoor)
+        else if (fixture is BaseHouseDoor door)
         {
-          BaseHouseDoor door = (BaseHouseDoor)fixture;
-
           if (door.Link != null)
             continue;
 
@@ -630,9 +624,7 @@ namespace Server.Multis
 
           for (int j = i + 1; j < Fixtures.Count; ++j)
           {
-            BaseHouseDoor check = Fixtures[j] as BaseHouseDoor;
-
-            if (check != null && check.Link == null && check.Facing == linkFacing &&
+            if (Fixtures[j] is BaseHouseDoor check && check.Link == null && check.Facing == linkFacing &&
                 check.X - door.X == xOffset && check.Y - door.Y == yOffset && check.Z == door.Z)
             {
               check.Link = door;
@@ -725,9 +717,7 @@ namespace Server.Multis
 
     public static void ApplyFoundation(FoundationType type, MultiComponentList mcl)
     {
-      int east, south, post, corner;
-
-      GetFoundationGraphics(type, out east, out south, out post, out corner);
+      GetFoundationGraphics(type, out int east, out int south, out int post, out int corner);
 
       int xCenter = mcl.Center.X;
       int yCenter = mcl.Center.Y;
@@ -834,7 +824,8 @@ namespace Server.Multis
 
     public void BeginCustomize(Mobile m)
     {
-      if (!m.CheckAlive()) return;
+      if (!m.CheckAlive())
+        return;
 
       if (SpellHelper.CheckCombat(m))
       {
@@ -1579,6 +1570,7 @@ namespace Server.Multis
       }
       catch
       {
+        // ignored
       }
     }
 
@@ -1706,9 +1698,7 @@ namespace Server.Multis
       Mobile from = state.Mobile;
       DesignContext context = DesignContext.Find(from);
 
-      HouseFoundation foundation = World.FindItem(pvSrc.ReadInt32()) as HouseFoundation;
-
-      if (foundation != null && from.Map == foundation.Map && from.InRange(foundation.GetWorldLocation(), 24) &&
+      if (World.FindItem(pvSrc.ReadInt32()) is HouseFoundation foundation && from.Map == foundation.Map && from.InRange(foundation.GetWorldLocation(), 24) &&
           from.CanSee(foundation))
       {
         DesignState stateToSend;
@@ -2139,8 +2129,8 @@ namespace Server.Multis
 
       Table[from] = c;
 
-      if (from is PlayerMobile)
-        ((PlayerMobile)from).DesignContext = c;
+      if (from is PlayerMobile pm)
+        pm.DesignContext = c;
 
       foundation.Customizer = from;
 
@@ -2180,11 +2170,8 @@ namespace Server.Multis
 
       Table.Remove(from);
 
-      if (from is PlayerMobile)
-        ((PlayerMobile)from).DesignContext = null;
-
-      if (context == null)
-        return;
+      if (from is PlayerMobile pm)
+        pm.DesignContext = null;
 
       context.Foundation.Customizer = null;
 
@@ -2437,7 +2424,7 @@ namespace Server.Multis
 
         ++planeCount;
 
-        int size = 0;
+        int size;
 
         if (i == 0)
           size = width * height * 2;
@@ -2573,7 +2560,7 @@ namespace Server.Multis
 
         while (count > 0)
         {
-          SendQueueEntry sqe = null;
+          SendQueueEntry sqe;
 
           lock (m_SendQueueSyncRoot)
           {
@@ -2582,7 +2569,7 @@ namespace Server.Multis
 
           try
           {
-            Packet p = null;
+            Packet p;
 
             lock (sqe.m_Root)
             {
diff --git a/Scripts/Multis/HousePlacementTool.cs b/Scripts/Multis/HousePlacementTool.cs
index 168a9c114..728d897e7 100644
--- a/Scripts/Multis/HousePlacementTool.cs
+++ b/Scripts/Multis/HousePlacementTool.cs
@@ -234,12 +234,10 @@ namespace Server.Items
       if (!from.CheckAlive() || from.Backpack?.FindItemByType<HousePlacementTool>() == null)
         return;
 
-      IPoint3D ip = o as IPoint3D;
-
-      if (ip != null)
+      if (o is IPoint3D ip)
       {
-        if (ip is Item)
-          ip = ((Item)ip).GetWorldTop();
+        if (ip is Item item)
+          ip = item.GetWorldTop();
 
         Point3D p = new Point3D(ip);
 
diff --git a/Scripts/Skills/Inscribe.cs b/Scripts/Skills/Inscribe.cs
index 99e32f605..14f6956e0 100644
--- a/Scripts/Skills/Inscribe.cs
+++ b/Scripts/Skills/Inscribe.cs
@@ -77,8 +77,7 @@ namespace Server.SkillHandlers
 
       protected override void OnTarget(Mobile from, object targeted)
       {
-        BaseBook book = targeted as BaseBook;
-        if (book == null)
+        if (!(targeted is BaseBook book))
         {
           from.SendLocalizedMessage(1046296); // That is not a book
         }
@@ -122,9 +121,7 @@ namespace Server.SkillHandlers
         if (m_BookSrc.Deleted)
           return;
 
-        BaseBook bookDst = targeted as BaseBook;
-
-        if (bookDst == null)
+        if (!(targeted is BaseBook bookDst))
         {
           from.SendLocalizedMessage(1046296); // That is not a book
         }
diff --git a/Scripts/Skills/Provocation.cs b/Scripts/Skills/Provocation.cs
index 68700b471..baca501ff 100644
--- a/Scripts/Skills/Provocation.cs
+++ b/Scripts/Skills/Provocation.cs
@@ -42,10 +42,8 @@ namespace Server.SkillHandlers
       {
         from.RevealingAction();
 
-        if (targeted is BaseCreature && from.CanBeHarmful((Mobile)targeted, true))
+        if (targeted is BaseCreature creature && from.CanBeHarmful(creature, true))
         {
-          BaseCreature creature = (BaseCreature)targeted;
-
           if (!m_Instrument.IsChildOf(from.Backpack))
           {
             from.SendLocalizedMessage(
@@ -91,10 +89,8 @@ namespace Server.SkillHandlers
       {
         from.RevealingAction();
 
-        if (targeted is BaseCreature)
+        if (targeted is BaseCreature creature)
         {
-          BaseCreature creature = (BaseCreature)targeted;
-
           if (!m_Instrument.IsChildOf(from.Backpack))
           {
             from.SendLocalizedMessage(
diff --git a/Scripts/Skills/RemoveTrap.cs b/Scripts/Skills/RemoveTrap.cs
index e62b01d05..a8913dc5e 100644
--- a/Scripts/Skills/RemoveTrap.cs
+++ b/Scripts/Skills/RemoveTrap.cs
@@ -45,10 +45,8 @@ namespace Server.SkillHandlers
         {
           from.SendLocalizedMessage(502816); // You feel that such an action would be inappropriate
         }
-        else if (targeted is TrappableContainer)
+        else if (targeted is TrappableContainer targ)
         {
-          TrappableContainer targ = (TrappableContainer)targeted;
-
           from.Direction = from.GetDirectionTo(targ);
 
           if (targ.TrapType == TrapType.None)
diff --git a/Scripts/Skills/Snooping.cs b/Scripts/Skills/Snooping.cs
index 174191e20..ed86a04ad 100644
--- a/Scripts/Skills/Snooping.cs
+++ b/Scripts/Skills/Snooping.cs
@@ -28,9 +28,7 @@ namespace Server.SkillHandlers
       if (reg == null || reg.IsDisabled())
         return true; // not in town? we can snoop any npc
 
-      BaseCreature cret = to as BaseCreature;
-
-      if (to.Body.IsHuman && (cret == null || !cret.AlwaysAttackable && !cret.AlwaysMurderer))
+      if (to.Body.IsHuman && (!(to is BaseCreature cret) || !cret.AlwaysAttackable && !cret.AlwaysMurderer))
         return false; // in town we cannot snoop blue human npcs
 
       return true;
@@ -81,7 +79,7 @@ namespace Server.SkillHandlers
 
         if (from.AccessLevel > AccessLevel.Player || from.CheckTargetSkill(SkillName.Snooping, cont, 0.0, 100.0))
         {
-          if (cont is TrappableContainer && ((TrappableContainer)cont).ExecuteTrap(from))
+          if (cont is TrappableContainer container && container.ExecuteTrap(from))
             return;
 
           cont.DisplayTo(from);
diff --git a/Scripts/Skills/SpiritSpeak.cs b/Scripts/Skills/SpiritSpeak.cs
index ffface8f7..4f2aaac63 100644
--- a/Scripts/Skills/SpiritSpeak.cs
+++ b/Scripts/Skills/SpiritSpeak.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using Server.Items;
 using Server.Network;
 using Server.Spells;
@@ -134,14 +135,9 @@ namespace Server.SkillHandlers
 
       public override void OnCast()
       {
-        Corpse toChannel = null;
-
-        foreach (Item item in Caster.GetItemsInRange(3))
-          if (item is Corpse && !((Corpse)item).Channeled)
-          {
-            toChannel = (Corpse)item;
-            break;
-          }
+        IPooledEnumerable<Corpse> eable = Caster.GetItemsInRange<Corpse>(3);
+        Corpse toChannel = eable.ToList().Find(item => item is Corpse corpse && !corpse.Channeled);
+        eable.Free();
 
         int max, min, mana, number;
 
diff --git a/Scripts/Skills/Stealing.cs b/Scripts/Skills/Stealing.cs
index 8977ddbc5..859e2b9c4 100644
--- a/Scripts/Skills/Stealing.cs
+++ b/Scripts/Skills/Stealing.cs
@@ -25,7 +25,7 @@ namespace Server.SkillHandlers
 
     public static bool IsInGuild(Mobile m)
     {
-      return m is PlayerMobile && ((PlayerMobile)m).NpcGuild == NpcGuild.ThievesGuild;
+      return m is PlayerMobile mobile && mobile.NpcGuild == NpcGuild.ThievesGuild;
     }
 
     public static bool IsInnocentTo(Mobile from, Mobile to)
@@ -72,7 +72,6 @@ namespace Server.SkillHandlers
       public StealingTarget(Mobile thief) : base(1, false, TargetFlags.None)
       {
         m_Thief = thief;
-
         AllowNonlocal = true;
       }
 
@@ -81,6 +80,7 @@ namespace Server.SkillHandlers
         Item stolen = null;
 
         object root = toSteal.RootParent;
+        Mobile mobRoot = root as Mobile;
 
         StealableArtifactsSpawner.StealableInstance si = null;
         if (toSteal.Parent == null || !toSteal.Movable)
@@ -94,16 +94,16 @@ namespace Server.SkillHandlers
         {
           m_Thief.SendMessage("You may not steal in this area.");
         }
-        else if (root is Mobile && ((Mobile)root).Player && !IsInGuild(m_Thief))
+        else if (mobRoot?.Player == true && !IsInGuild(m_Thief))
         {
           m_Thief.SendLocalizedMessage(1005596); // You must be in the thieves guild to steal from other players.
         }
-        else if (SuspendOnMurder && root is Mobile && ((Mobile)root).Player && IsInGuild(m_Thief) &&
+        else if (SuspendOnMurder && mobRoot?.Player == true && IsInGuild(m_Thief) &&
                  m_Thief.Kills > 0)
         {
           m_Thief.SendLocalizedMessage(502706); // You are currently suspended from the thieves guild.
         }
-        else if (root is BaseVendor && ((BaseVendor)root).IsInvulnerable)
+        else if (root is BaseVendor vendor && vendor.IsInvulnerable)
         {
           m_Thief.SendLocalizedMessage(1005598); // You can't steal from shopkeepers.
         }
@@ -122,14 +122,12 @@ namespace Server.SkillHandlers
 
         #region Sigils
 
-        else if (toSteal is Sigil)
+        else if (toSteal is Sigil sig)
         {
           PlayerState pl = PlayerState.Find(m_Thief);
           Faction faction = pl?.Faction;
 
-          Sigil sig = (Sigil)toSteal;
-
-          if (!m_Thief.InRange(toSteal.GetWorldLocation(), 1))
+          if (!m_Thief.InRange(sig.GetWorldLocation(), 1))
           {
             m_Thief.SendLocalizedMessage(502703); // You must be standing next to an item to steal it.
           }
@@ -242,11 +240,11 @@ namespace Server.SkillHandlers
         {
           m_Thief.SendLocalizedMessage(502704); // You catch yourself red-handed.
         }
-        else if (root is Mobile && ((Mobile)root).AccessLevel > AccessLevel.Player)
+        else if (mobRoot?.AccessLevel > AccessLevel.Player)
         {
           m_Thief.SendLocalizedMessage(502710); // You can't steal that!
         }
-        else if (root is Mobile && !m_Thief.CanBeHarmful((Mobile)root))
+        else if (mobRoot != null && !m_Thief.CanBeHarmful((Mobile)root))
         {
         }
         else if (root is Corpse)
@@ -337,20 +335,20 @@ namespace Server.SkillHandlers
         object root = null;
         bool caught = false;
 
-        if (target is Item)
+        if (target is Item item)
         {
-          root = ((Item)target).RootParent;
-          stolen = TryStealItem((Item)target, ref caught);
+          root = item.RootParent;
+          stolen = TryStealItem(item, ref caught);
         }
-        else if (target is Mobile)
+        else if (target is Mobile mobile)
         {
-          Container pack = ((Mobile)target).Backpack;
+          Container pack = mobile.Backpack;
 
           if (pack != null && pack.Items.Count > 0)
           {
             int randomIndex = Utility.Random(pack.Items.Count);
 
-            root = target;
+            root = mobile;
             stolen = TryStealItem(pack.Items[randomIndex], ref caught);
           }
         }
@@ -358,28 +356,27 @@ namespace Server.SkillHandlers
         {
           m_Thief.SendLocalizedMessage(502710); // You can't steal that!
         }
+        
+        Mobile mobRoot = root as Mobile;
 
         if (stolen != null)
         {
           from.AddToBackpack(stolen);
 
-          if (!(stolen is Container || stolen.Stackable)) StolenItem.Add(stolen, m_Thief, root as Mobile);
+          if (!(stolen is Container || stolen.Stackable))
+            StolenItem.Add(stolen, m_Thief, mobRoot);
         }
 
+        Corpse corpse = root as Corpse;
+
         if (caught)
         {
-          if (root == null)
+          if (root == null || corpse?.IsCriminalAction(m_Thief) == true)
           {
             m_Thief.CriminalAction(false);
           }
-          else if (root is Corpse && ((Corpse)root).IsCriminalAction(m_Thief))
+          else if (mobRoot != null)
           {
-            m_Thief.CriminalAction(false);
-          }
-          else if (root is Mobile)
-          {
-            Mobile mobRoot = (Mobile)root;
-
             if (!IsInGuild(mobRoot) && IsInnocentTo(m_Thief, mobRoot))
               m_Thief.CriminalAction(false);
 
@@ -390,16 +387,14 @@ namespace Server.SkillHandlers
                 ns.Mobile.SendMessage(message);
           }
         }
-        else if (root is Corpse && ((Corpse)root).IsCriminalAction(m_Thief))
+        else if (corpse?.IsCriminalAction(m_Thief) == true)
         {
           m_Thief.CriminalAction(false);
         }
 
-        if (root is Mobile && ((Mobile)root).Player && m_Thief is PlayerMobile &&
-            IsInnocentTo(m_Thief, (Mobile)root) && !IsInGuild((Mobile)root))
+        if (mobRoot?.Player == true && m_Thief is PlayerMobile pm &&
+            IsInnocentTo(pm, mobRoot) && !IsInGuild(mobRoot))
         {
-          PlayerMobile pm = (PlayerMobile)m_Thief;
-
           pm.PermaFlags.Add((Mobile)root);
           pm.Delta(MobileDelta.Noto);
         }
diff --git a/Scripts/Skills/Stealth.cs b/Scripts/Skills/Stealth.cs
index 16f1494c9..e696af453 100644
--- a/Scripts/Skills/Stealth.cs
+++ b/Scripts/Skills/Stealth.cs
@@ -38,9 +38,7 @@ namespace Server.SkillHandlers
 
       for (int i = 0; i < m.Items.Count; i++)
       {
-        BaseArmor armor = m.Items[i] as BaseArmor;
-
-        if (armor == null)
+        if (!(m.Items[i] is BaseArmor armor))
           continue;
 
         int materialType = (int)armor.MaterialType;
@@ -91,9 +89,7 @@ namespace Server.SkillHandlers
 
           m.AllowedStealthSteps = steps;
 
-          PlayerMobile pm = m as PlayerMobile; // IsStealthing should be moved to Server.Mobiles
-
-          if (pm != null)
+          if (m is PlayerMobile pm)
             pm.IsStealthing = true;
 
           m.SendLocalizedMessage(502730); // You begin to move quietly.
diff --git a/Scripts/Skills/TasteID.cs b/Scripts/Skills/TasteID.cs
index 43b41d358..654b54924 100644
--- a/Scripts/Skills/TasteID.cs
+++ b/Scripts/Skills/TasteID.cs
@@ -35,10 +35,8 @@ namespace Server.SkillHandlers
         {
           from.SendLocalizedMessage(502816); // You feel that such an action would be inappropriate.
         }
-        else if (targeted is Food)
+        else if (targeted is Food food)
         {
-          Food food = (Food)targeted;
-
           if (from.CheckTargetSkill(SkillName.TasteID, food, 0, 100))
           {
             if (food.Poison != null)
@@ -52,17 +50,13 @@ namespace Server.SkillHandlers
             food.SendLocalizedMessageTo(from, 502823); // You cannot discern anything about this substance.
           }
         }
-        else if (targeted is BasePotion)
+        else if (targeted is BasePotion potion)
         {
-          BasePotion potion = (BasePotion)targeted;
-
           potion.SendLocalizedMessageTo(from, 502813); // You already know what kind of potion that is.
           potion.SendLocalizedMessageTo(from, potion.LabelNumber);
         }
-        else if (targeted is PotionKeg)
+        else if (targeted is PotionKeg keg)
         {
-          PotionKeg keg = (PotionKeg)targeted;
-
           if (keg.Held <= 0)
           {
             keg.SendLocalizedMessageTo(from, 502228); // There is nothing in the keg to taste!
diff --git a/Scripts/SpecialSystems/Engines/GiftGiving.cs b/Scripts/SpecialSystems/Engines/GiftGiving.cs
index 21537afb8..728e2d0c5 100644
--- a/Scripts/SpecialSystems/Engines/GiftGiving.cs
+++ b/Scripts/SpecialSystems/Engines/GiftGiving.cs
@@ -26,9 +26,7 @@ namespace Server.Misc
 
     private static void EventSink_Login(LoginEventArgs e)
     {
-      Account acct = e.Mobile.Account as Account;
-
-      if (acct == null)
+      if (!(e.Mobile.Account is Account acct))
         return;
 
       DateTime now = DateTime.UtcNow;
diff --git a/Scripts/Spells/Base/Spell.cs b/Scripts/Spells/Base/Spell.cs
index e6ea8a6a8..5159d0fd3 100644
--- a/Scripts/Spells/Base/Spell.cs
+++ b/Scripts/Spells/Base/Spell.cs
@@ -90,13 +90,8 @@ namespace Server.Spells
       if (IsCasting)
       {
         object o = ProtectionSpell.Registry[Caster];
-        bool disturb = true;
 
-        if (o is double)
-          if ((double)o > Utility.RandomDouble() * 100.0)
-            disturb = false;
-
-        if (disturb)
+        if (!(o is double d) || d <= Utility.RandomDouble() * 100.0)
           Disturb(DisturbType.Hurt, false, true);
       }
     }
@@ -205,8 +200,8 @@ namespace Server.Spells
 
       TransformContext context = TransformationSpellHelper.GetContext(Caster);
 
-      if (context?.Spell is ReaperFormSpell)
-        damageBonus += ((ReaperFormSpell)context.Spell).SpellDamageBonus;
+      if (context?.Spell is ReaperFormSpell spell)
+        damageBonus += spell.SpellDamageBonus;
 
       damage = AOS.Scale(damage, 100 + damageBonus);
 
@@ -380,20 +375,12 @@ namespace Server.Spells
       }
     }
 
-    public void Disturb(DisturbType type)
-    {
-      Disturb(type, true, false);
-    }
-
     public virtual bool CheckDisturb(DisturbType type, bool firstCircle, bool resistable)
     {
-      if (resistable && Scroll is BaseWand)
-        return false;
-
-      return true;
+      return !(resistable && Scroll is BaseWand);
     }
 
-    public void Disturb(DisturbType type, bool firstCircle, bool resistable)
+    public void Disturb(DisturbType type, bool firstCircle = true, bool resistable = false)
     {
       if (!CheckDisturb(type, firstCircle, resistable))
         return;
@@ -456,7 +443,7 @@ namespace Server.Spells
       if (Scroll is BaseWand)
         return;
 
-      if (Info.Mantra != null && Info.Mantra.Length > 0 && Caster.Player)
+      if (!string.IsNullOrEmpty(Info.Mantra) && Caster.Player)
         Caster.PublicOverheadMessage(MessageType.Spell, Caster.SpeechHue, true, Info.Mantra, false);
     }
 
@@ -464,8 +451,8 @@ namespace Server.Spells
     {
       StartCastTime = Core.TickCount;
 
-      if (Core.AOS && Caster.Spell is Spell && ((Spell)Caster.Spell).State == SpellState.Sequencing)
-        ((Spell)Caster.Spell).Disturb(DisturbType.NewCast);
+      if (Core.AOS && Caster.Spell is Spell spell && spell.State == SpellState.Sequencing)
+        spell.Disturb(DisturbType.NewCast);
 
       if (!Caster.CheckAlive()) return false;
 
@@ -491,9 +478,9 @@ namespace Server.Spells
       {
         Caster.SendLocalizedMessage(502644); // You have not yet recovered from casting a spell.
       }
-      else if (Caster is PlayerMobile && ((PlayerMobile)Caster).PeacedUntil > DateTime.UtcNow)
+      else if (Caster is PlayerMobile mobile && mobile.PeacedUntil > DateTime.UtcNow)
       {
-        Caster.SendLocalizedMessage(1072060); // You cannot cast a spell while calmed.
+        mobile.SendLocalizedMessage(1072060); // You cannot cast a spell while calmed.
       }
 
       #region Dueling
@@ -582,9 +569,7 @@ namespace Server.Spells
       if (Scroll is BaseWand)
         return true;
 
-      double minSkill, maxSkill;
-
-      GetCastSkills(out minSkill, out maxSkill);
+      GetCastSkills(out double minSkill, out double maxSkill);
 
       if (DamageSkill != CastSkill)
         Caster.CheckSkill(DamageSkill, 0.0, Caster.Skills[DamageSkill].Cap);
@@ -710,8 +695,8 @@ namespace Server.Spells
         DoFizzle();
       }
       else if (Scroll != null && !(Scroll is Runebook) &&
-               (Scroll.Amount <= 0 || Scroll.Deleted || Scroll.RootParent != Caster || Scroll is BaseWand &&
-                (((BaseWand)Scroll).Charges <= 0 || Scroll.Parent != Caster)))
+               (Scroll.Amount <= 0 || Scroll.Deleted || Scroll.RootParent != Caster || Scroll is BaseWand baseWand &&
+                (baseWand.Charges <= 0 || baseWand.Parent != Caster)))
       {
         DoFizzle();
       }
@@ -728,9 +713,9 @@ namespace Server.Spells
         Caster.SendLocalizedMessage(502646); // You cannot cast a spell while frozen.
         DoFizzle();
       }
-      else if (Caster is PlayerMobile && ((PlayerMobile)Caster).PeacedUntil > DateTime.UtcNow)
+      else if (Caster is PlayerMobile mobile && mobile.PeacedUntil > DateTime.UtcNow)
       {
-        Caster.SendLocalizedMessage(1072060); // You cannot cast a spell while calmed.
+        mobile.SendLocalizedMessage(1072060); // You cannot cast a spell while calmed.
         DoFizzle();
       }
       else if (CheckFizzle())
@@ -741,9 +726,9 @@ namespace Server.Spells
         {
           Scroll.Consume();
         }
-        else if (Scroll is BaseWand)
+        else if (Scroll is BaseWand wand)
         {
-          ((BaseWand)Scroll).ConsumeCharge(Caster);
+          wand.ConsumeCharge(Caster);
           Caster.RevealingAction();
         }
 
diff --git a/Scripts/Spells/Base/SpellHelper.cs b/Scripts/Spells/Base/SpellHelper.cs
index fbb88dda6..07dd3e4d1 100644
--- a/Scripts/Spells/Base/SpellHelper.cs
+++ b/Scripts/Spells/Base/SpellHelper.cs
@@ -102,6 +102,7 @@ namespace Server.Spells
       IsMLDungeon
     };
 
+    // TODO: Find a better way
     private static bool[,] m_Rules =
     {
       /*T2A(Fel),	Khaldun,	Ilshenar,	Wind(Tram),	Wind(Fel),	Dungeons(Fel),	Solen(Tram),	Solen(Fel),	CrystalCave(Malas),	Gauntlet(Malas),	Gauntlet(Ferry),	SafeZone,	Stronghold,	ChampionSpawn,	Dungeons(Tokuno[Malas]),	LampRoom(Doom),	GuardianRoom(Doom),	Heartwood,	MLDungeons */
@@ -155,17 +156,7 @@ namespace Server.Spells
       return Core.AOS ? AosDamageDelay : OldDamageDelay;
     }
 
-    public static bool CheckMulti(Point3D p, Map map)
-    {
-      return CheckMulti(p, map, true, 0);
-    }
-
-    public static bool CheckMulti(Point3D p, Map map, bool houses)
-    {
-      return CheckMulti(p, map, houses, 0);
-    }
-
-    public static bool CheckMulti(Point3D p, Map map, bool houses, int housingrange)
+    public static bool CheckMulti(Point3D p, Map map, bool houses = true, int housingrange = 0)
     {
       if (map == null || map == Map.Internal)
         return false;
@@ -176,10 +167,8 @@ namespace Server.Spells
       {
         BaseMulti multi = sector.Multis[i];
 
-        if (multi is BaseHouse)
+        if (multi is BaseHouse bh)
         {
-          BaseHouse bh = (BaseHouse)multi;
-
           if (houses && bh.IsInside(p, 16) || housingrange > 0 && bh.InRange(p, housingrange))
             return true;
         }
@@ -194,15 +183,11 @@ namespace Server.Spells
 
     public static void Turn(Mobile from, object to)
     {
-      IPoint3D target = to as IPoint3D;
-
-      if (target == null)
+      if (!(to is IPoint3D target))
         return;
 
-      if (target is Item)
+      if (target is Item item)
       {
-        Item item = (Item)target;
-
         if (item.RootParent != from)
           from.Direction = from.GetDirectionTo(item.GetWorldLocation());
       }
@@ -258,26 +243,18 @@ namespace Server.Spells
 
     public static bool CanRevealCaster(Mobile m)
     {
-      if (m is BaseCreature)
-      {
-        BaseCreature c = (BaseCreature)m;
 
-        if (!c.Controlled)
-          return true;
-      }
-
-      return false;
+      return m is BaseCreature c && !c.Controlled;
     }
 
     public static void GetSurfaceTop(ref IPoint3D p)
     {
-      if (p is Item)
+      if (p is Item item)
       {
-        p = ((Item)p).GetSurfaceTop();
+        p = item.GetSurfaceTop();
       }
-      else if (p is StaticTarget)
+      else if (p is StaticTarget t)
       {
-        StaticTarget t = (StaticTarget)p;
         int z = t.Z;
 
         if ((t.Flags & TileFlag.Surface) == 0)
@@ -408,9 +385,8 @@ namespace Server.Spells
     {
       Guild g = m.Guild as Guild;
 
-      if (g == null && m is BaseCreature)
+      if (g == null && m is BaseCreature c)
       {
-        BaseCreature c = (BaseCreature)m;
         m = c.ControlMaster;
 
         if (m != null)
@@ -436,26 +412,23 @@ namespace Server.Spells
       if (to.Hidden && to.AccessLevel > from.AccessLevel)
         return false;
 
+      BaseCreature bcFrom = from as BaseCreature;
+      BaseCreature bcTarg = to as BaseCreature;
+
       #region Dueling
 
-      PlayerMobile pmFrom = from as PlayerMobile;
-      PlayerMobile pmTarg = to as PlayerMobile;
+      PlayerMobile pmFrom;
+      PlayerMobile pmTarg;
 
-      if (pmFrom == null && from is BaseCreature)
-      {
-        BaseCreature bcFrom = (BaseCreature)from;
+      if (bcFrom != null && bcFrom.Summoned)
+        pmFrom = bcFrom.SummonMaster as PlayerMobile;
+      else
+        pmFrom = from as PlayerMobile;
 
-        if (bcFrom.Summoned)
-          pmFrom = bcFrom.SummonMaster as PlayerMobile;
-      }
-
-      if (pmTarg == null && to is BaseCreature)
-      {
-        BaseCreature bcTarg = (BaseCreature)to;
-
-        if (bcTarg.Summoned)
-          pmTarg = bcTarg.SummonMaster as PlayerMobile;
-      }
+      if (bcTarg != null && bcTarg.Summoned)
+        pmTarg = bcTarg.SummonMaster as PlayerMobile;
+      else
+        pmTarg = to as PlayerMobile;
 
       if (pmFrom != null && pmTarg != null)
         if (pmFrom.DuelContext != null && pmFrom.DuelContext == pmTarg.DuelContext && pmFrom.DuelContext.Started &&
@@ -475,37 +448,27 @@ namespace Server.Spells
       if (p != null && p.Contains(to))
         return false;
 
-      if (to is BaseCreature)
+      if (bcTarg != null && (bcTarg.Controlled || bcTarg.Summoned))
       {
-        BaseCreature c = (BaseCreature)to;
+        if (bcTarg.ControlMaster == from || bcTarg.SummonMaster == from)
+          return false;
 
-        if (c.Controlled || c.Summoned)
-        {
-          if (c.ControlMaster == from || c.SummonMaster == from)
-            return false;
-
-          if (p != null && (p.Contains(c.ControlMaster) || p.Contains(c.SummonMaster)))
-            return false;
-        }
+        if (p != null && (p.Contains(bcTarg.ControlMaster) || p.Contains(bcTarg.SummonMaster)))
+          return false;
       }
 
-      if (from is BaseCreature)
+      if (bcFrom != null && (bcFrom.Controlled || bcFrom.Summoned))
       {
-        BaseCreature c = (BaseCreature)from;
+        if (bcFrom.ControlMaster == to || bcFrom.SummonMaster == to)
+          return false;
 
-        if (c.Controlled || c.Summoned)
-        {
-          if (c.ControlMaster == to || c.SummonMaster == to)
-            return false;
+        p = Party.Get(to);
 
-          p = Party.Get(to);
-
-          if (p != null && (p.Contains(c.ControlMaster) || p.Contains(c.SummonMaster)))
-            return false;
-        }
+        if (p != null && (p.Contains(bcFrom.ControlMaster) || p.Contains(bcFrom.SummonMaster)))
+          return false;
       }
 
-      if (to is BaseCreature && !((BaseCreature)to).Controlled && ((BaseCreature)to).InitialInnocent)
+      if (bcTarg != null && !bcTarg.Controlled && bcTarg.InitialInnocent)
         return true;
 
       int noto = Notoriety.Compute(from, to);
@@ -661,13 +624,8 @@ namespace Server.Spells
       }
 
       // Always allow monsters to teleport
-      if (caster is BaseCreature && (type == TravelCheckType.TeleportTo || type == TravelCheckType.TeleportFrom))
-      {
-        BaseCreature bc = (BaseCreature)caster;
-
-        if (!bc.Controlled && !bc.Summoned)
+      if (caster is BaseCreature bc && !bc.Controlled && !bc.Summoned && (type == TravelCheckType.TeleportTo || type == TravelCheckType.TeleportFrom))
           return true;
-      }
 
       m_TravelCaster = caster;
       m_TravelType = type;
@@ -883,12 +841,12 @@ namespace Server.Spells
     }
 
     //towns
-    public static bool IsTown(IPoint3D loc, Mobile caster)
+    public static bool IsTown(IPoint3D ip, Mobile caster)
     {
-      if (loc is Item)
-        loc = ((Item)loc).GetWorldLocation();
+      if (ip is Item item)
+        ip = item.GetWorldLocation();
 
-      return IsTown(new Point3D(loc), caster);
+      return IsTown(new Point3D(ip), caster);
     }
 
     public static bool IsTown(Point3D loc, Mobile caster)
@@ -917,12 +875,12 @@ namespace Server.Spells
       return reg != null && !reg.IsDisabled();
     }
 
-    public static bool CheckTown(IPoint3D loc, Mobile caster)
+    public static bool CheckTown(IPoint3D ip, Mobile caster)
     {
-      if (loc is Item)
-        loc = ((Item)loc).GetWorldLocation();
+      if (ip is Item item)
+        ip = item.GetWorldLocation();
 
-      return CheckTown(new Point3D(loc), caster);
+      return CheckTown(new Point3D(ip), caster);
     }
 
     public static bool CheckTown(Point3D loc, Mobile caster)
@@ -971,18 +929,18 @@ namespace Server.Spells
           target = temp;
         }
       }
-      else if (target is BaseCreature)
+      else if (target is BaseCreature creature)
       {
         bool reflect = false;
 
-        ((BaseCreature)target).CheckReflect(caster, ref reflect);
+        creature.CheckReflect(caster, ref reflect);
 
         if (reflect)
         {
-          target.FixedEffect(0x37B9, 10, 5);
+          creature.FixedEffect(0x37B9, 10, 5);
 
           Mobile temp = caster;
-          caster = target;
+          caster = creature;
           target = temp;
         }
       }
@@ -1022,63 +980,45 @@ namespace Server.Spells
         new SpellDamageTimer(spell, target, from, iDamage, delay).Start();
       }
 
-      if (target is BaseCreature && from != null && delay == TimeSpan.Zero)
+      if (target is BaseCreature c && from != null && delay == TimeSpan.Zero)
       {
-        BaseCreature c = (BaseCreature)target;
-
         c.OnHarmfulSpell(from);
         c.OnDamagedBySpell(from);
       }
     }
 
     public static void Damage(Spell spell, Mobile target, double damage, int phys, int fire, int cold, int pois,
-      int nrgy)
+      int nrgy, int chaos = 0, DFAlgorithm dfa = DFAlgorithm.Standard)
     {
-      TimeSpan ts = GetDamageDelayForSpell(spell);
-
-      Damage(spell, ts, target, spell.Caster, damage, phys, fire, cold, pois, nrgy, DFAlgorithm.Standard);
-    }
-
-    public static void Damage(Spell spell, Mobile target, double damage, int phys, int fire, int cold, int pois,
-      int nrgy, DFAlgorithm dfa)
-    {
-      TimeSpan ts = GetDamageDelayForSpell(spell);
-
-      Damage(spell, ts, target, spell.Caster, damage, phys, fire, cold, pois, nrgy, dfa);
+      Damage(spell, GetDamageDelayForSpell(spell), target, spell.Caster, damage, phys, fire, cold, pois, nrgy, chaos, dfa);
     }
 
     public static void Damage(TimeSpan delay, Mobile target, double damage, int phys, int fire, int cold, int pois,
-      int nrgy)
+      int nrgy, int chaos = 0, DFAlgorithm dfa = DFAlgorithm.Standard)
     {
-      Damage(delay, target, null, damage, phys, fire, cold, pois, nrgy);
+      Damage(delay, target, null, damage, phys, fire, cold, pois, nrgy, chaos, dfa);
     }
 
     public static void Damage(TimeSpan delay, Mobile target, Mobile from, double damage, int phys, int fire, int cold,
-      int pois, int nrgy)
+      int pois, int nrgy, int chaos = 0, DFAlgorithm dfa = DFAlgorithm.Standard)
     {
-      Damage(delay, target, from, damage, phys, fire, cold, pois, nrgy, DFAlgorithm.Standard);
-    }
-
-    public static void Damage(TimeSpan delay, Mobile target, Mobile from, double damage, int phys, int fire, int cold,
-      int pois, int nrgy, DFAlgorithm dfa)
-    {
-      Damage(null, delay, target, from, damage, phys, fire, cold, pois, nrgy, dfa);
+      Damage(null, delay, target, from, damage, phys, fire, cold, pois, nrgy, chaos, dfa);
     }
 
     public static void Damage(Spell spell, TimeSpan delay, Mobile target, Mobile from, double damage, int phys, int fire,
-      int cold, int pois, int nrgy, DFAlgorithm dfa)
+      int cold, int pois, int nrgy, int chaos = 0, DFAlgorithm dfa = DFAlgorithm.Standard)
     {
-      int iDamage = (int)damage;
+      int dmg = (int)damage;
 
       if (delay == TimeSpan.Zero)
       {
-        (from as BaseCreature)?.AlterSpellDamageTo(target, ref iDamage);
+        (from as BaseCreature)?.AlterSpellDamageTo(target, ref dmg);
 
-        (target as BaseCreature)?.AlterSpellDamageFrom(from, ref iDamage);
+        (target as BaseCreature)?.AlterSpellDamageFrom(from, ref dmg);
 
         WeightOverloading.DFA = dfa;
 
-        int damageGiven = AOS.Damage(target, from, iDamage, phys, fire, cold, pois, nrgy);
+        int damageGiven = AOS.Damage(target, from, dmg, phys, fire, cold, pois, nrgy, chaos);
 
         if (from != null) // sanity check
           DoLeech(damageGiven, from, target);
@@ -1087,13 +1027,11 @@ namespace Server.Spells
       }
       else
       {
-        new SpellDamageTimerAOS(spell, target, from, iDamage, phys, fire, cold, pois, nrgy, delay, dfa).Start();
+        new SpellDamageTimerAOS(spell, delay, target, from, dmg, phys, fire, cold, pois, nrgy, chaos, dfa).Start();
       }
 
-      if (target is BaseCreature && from != null && delay == TimeSpan.Zero)
+      if (target is BaseCreature c && from != null && delay == TimeSpan.Zero)
       {
-        BaseCreature c = (BaseCreature)target;
-
         c.OnHarmfulSpell(from);
         c.OnDamagedBySpell(from);
       }
@@ -1103,25 +1041,25 @@ namespace Server.Spells
     {
       TransformContext context = TransformationSpellHelper.GetContext(from);
 
-      if (context != null) /* cleanup */
+      if (context == null) /* cleanup */
+        return;
+      
+      if (context.Type == typeof(WraithFormSpell))
       {
-        if (context.Type == typeof(WraithFormSpell))
+        int wraithLeech =
+          5 + (int)(15 * from.Skills.SpiritSpeak.Value / 100); // Wraith form gives 5-20% mana leech
+        int manaLeech = AOS.Scale(damageGiven, wraithLeech);
+        if (manaLeech != 0)
         {
-          int wraithLeech =
-            5 + (int)(15 * from.Skills.SpiritSpeak.Value / 100); // Wraith form gives 5-20% mana leech
-          int manaLeech = AOS.Scale(damageGiven, wraithLeech);
-          if (manaLeech != 0)
-          {
-            from.Mana += manaLeech;
-            from.PlaySound(0x44D);
-          }
-        }
-        else if (context.Type == typeof(VampiricEmbraceSpell))
-        {
-          from.Hits += AOS.Scale(damageGiven, 20);
+          from.Mana += manaLeech;
           from.PlaySound(0x44D);
         }
       }
+      else if (context.Type == typeof(VampiricEmbraceSpell))
+      {
+        from.Hits += AOS.Scale(damageGiven, 20);
+        from.PlaySound(0x44D);
+      }
     }
 
     public static void Heal(int amount, Mobile target, Mobile from)
@@ -1172,12 +1110,12 @@ namespace Server.Spells
     {
       private int m_Damage;
       private DFAlgorithm m_DFA;
-      private int m_Phys, m_Fire, m_Cold, m_Pois, m_Nrgy;
+      private int m_Phys, m_Fire, m_Cold, m_Pois, m_Nrgy, m_Chaos;
       private Spell m_Spell;
       private Mobile m_Target, m_From;
 
-      public SpellDamageTimerAOS(Spell s, Mobile target, Mobile from, int damage, int phys, int fire, int cold,
-        int pois, int nrgy, TimeSpan delay, DFAlgorithm dfa)
+      public SpellDamageTimerAOS(Spell s, TimeSpan delay, Mobile target, Mobile from, int damage, int phys, int fire, int cold,
+        int pois, int nrgy, int chaos, DFAlgorithm dfa)
         : base(delay)
       {
         m_Target = target;
@@ -1188,6 +1126,7 @@ namespace Server.Spells
         m_Cold = cold;
         m_Pois = pois;
         m_Nrgy = nrgy;
+        m_Chaos = chaos;
         m_DFA = dfa;
         m_Spell = s;
         if (m_Spell != null && m_Spell.DelayedDamage && !m_Spell.DelayedDamageStacking)
@@ -1198,27 +1137,28 @@ namespace Server.Spells
 
       protected override void OnTick()
       {
-        if (m_From is BaseCreature && m_Target != null)
-          ((BaseCreature)m_From).AlterSpellDamageTo(m_Target, ref m_Damage);
+        BaseCreature bcFrom = m_From as BaseCreature;
+        BaseCreature bcTarg = m_Target as BaseCreature;
+        
+        if (bcFrom != null && m_Target != null)
+          bcFrom.AlterSpellDamageTo(m_Target, ref m_Damage);
 
-        if (m_Target is BaseCreature && m_From != null)
-          ((BaseCreature)m_Target).AlterSpellDamageFrom(m_From, ref m_Damage);
+        if (bcTarg != null && m_From != null)
+          bcTarg.AlterSpellDamageFrom(m_From, ref m_Damage);
 
         WeightOverloading.DFA = m_DFA;
 
-        int damageGiven = AOS.Damage(m_Target, m_From, m_Damage, m_Phys, m_Fire, m_Cold, m_Pois, m_Nrgy);
+        int damageGiven = AOS.Damage(m_Target, m_From, m_Damage, m_Phys, m_Fire, m_Cold, m_Pois, m_Nrgy, m_Chaos);
 
         if (m_From != null) // sanity check
           DoLeech(damageGiven, m_From, m_Target);
 
         WeightOverloading.DFA = DFAlgorithm.Standard;
 
-        if (m_Target is BaseCreature && m_From != null)
+        if (bcTarg != null && m_From != null)
         {
-          BaseCreature c = (BaseCreature)m_Target;
-
-          c.OnHarmfulSpell(m_From);
-          c.OnDamagedBySpell(m_From);
+          bcTarg.OnHarmfulSpell(m_From);
+          bcTarg.OnDamagedBySpell(m_From);
         }
 
         m_Spell?.RemoveDelayedDamageContext(m_Target);
@@ -1253,9 +1193,7 @@ namespace Server.Spells
 
     public static bool OnCast(Mobile caster, Spell spell)
     {
-      ITransformationSpell transformSpell = spell as ITransformationSpell;
-
-      if (transformSpell == null)
+      if (!(spell is ITransformationSpell transformSpell))
         return false;
 
       if (Sigil.ExistsOn(caster))
diff --git a/Scripts/Spells/Bushido/Evasion.cs b/Scripts/Spells/Bushido/Evasion.cs
index e631140d0..6213eca09 100644
--- a/Scripts/Spells/Bushido/Evasion.cs
+++ b/Scripts/Spells/Bushido/Evasion.cs
@@ -37,9 +37,7 @@ namespace Server.Spells.Bushido
       if (Caster == null) // Sanity
         return false;
 
-      BaseWeapon weap = Caster.FindItemOnLayer(Layer.OneHanded) as BaseWeapon;
-
-      if (weap == null)
+      if (!(Caster.FindItemOnLayer(Layer.OneHanded) is BaseWeapon weap))
         weap = Caster.FindItemOnLayer(Layer.TwoHanded) as BaseWeapon;
 
       if (weap != null)
@@ -70,9 +68,7 @@ namespace Server.Spells.Bushido
 
     public static bool CheckSpellEvasion(Mobile defender)
     {
-      BaseWeapon weap = defender.FindItemOnLayer(Layer.OneHanded) as BaseWeapon;
-
-      if (weap == null)
+      if (!(defender.FindItemOnLayer(Layer.OneHanded) is BaseWeapon weap))
         weap = defender.FindItemOnLayer(Layer.TwoHanded) as BaseWeapon;
 
       if (Core.ML)
diff --git a/Scripts/Spells/Bushido/HonorableExecution.cs b/Scripts/Spells/Bushido/HonorableExecution.cs
index 78f3cdd66..62c89abe4 100644
--- a/Scripts/Spells/Bushido/HonorableExecution.cs
+++ b/Scripts/Spells/Bushido/HonorableExecution.cs
@@ -28,9 +28,7 @@ namespace Server.Spells.Bushido
 
       ClearCurrentMove(attacker);
 
-      HonorableExecutionInfo info = m_Table[attacker] as HonorableExecutionInfo;
-
-      if (info != null)
+      if (m_Table[attacker] is HonorableExecutionInfo info)
       {
         info.Clear();
 
@@ -54,14 +52,15 @@ namespace Server.Spells.Bushido
       }
       else
       {
-        ArrayList mods = new ArrayList();
-
-        mods.Add(new ResistanceMod(ResistanceType.Physical, -40));
-        mods.Add(new ResistanceMod(ResistanceType.Fire, -40));
-        mods.Add(new ResistanceMod(ResistanceType.Cold, -40));
-        mods.Add(new ResistanceMod(ResistanceType.Poison, -40));
-        mods.Add(new ResistanceMod(ResistanceType.Energy, -40));
-
+        ArrayList mods = new ArrayList
+        {
+          new ResistanceMod(ResistanceType.Physical, -40),
+          new ResistanceMod(ResistanceType.Fire, -40),
+          new ResistanceMod(ResistanceType.Cold, -40),
+          new ResistanceMod(ResistanceType.Poison, -40),
+          new ResistanceMod(ResistanceType.Energy, -40)
+        };
+        
         double resSpells = attacker.Skills[SkillName.MagicResist].Value;
 
         if (resSpells > 0.0)
@@ -78,9 +77,7 @@ namespace Server.Spells.Bushido
 
     public static int GetSwingBonus(Mobile target)
     {
-      HonorableExecutionInfo info = m_Table[target] as HonorableExecutionInfo;
-
-      if (info == null)
+      if (!(m_Table[target] is HonorableExecutionInfo info))
         return 0;
 
       return info.m_SwingBonus;
@@ -88,9 +85,7 @@ namespace Server.Spells.Bushido
 
     public static bool IsUnderPenalty(Mobile target)
     {
-      HonorableExecutionInfo info = m_Table[target] as HonorableExecutionInfo;
-
-      if (info == null)
+      if (!(m_Table[target] is HonorableExecutionInfo info))
         return false;
 
       return info.m_Penalty;
@@ -98,9 +93,7 @@ namespace Server.Spells.Bushido
 
     public static void RemovePenalty(Mobile target)
     {
-      HonorableExecutionInfo info = m_Table[target] as HonorableExecutionInfo;
-
-      if (info == null || !info.m_Penalty)
+      if (!(m_Table[target] is HonorableExecutionInfo info) || !info.m_Penalty)
         return;
 
       info.Clear();
@@ -112,9 +105,7 @@ namespace Server.Spells.Bushido
 
     public void EndEffect(object state)
     {
-      HonorableExecutionInfo info = (HonorableExecutionInfo)state;
-
-      RemovePenalty(info.m_Mobile);
+      RemovePenalty(((HonorableExecutionInfo)state).m_Mobile);
     }
 
     private class HonorableExecutionInfo
@@ -125,15 +116,11 @@ namespace Server.Spells.Bushido
       public int m_SwingBonus;
       public Timer m_Timer;
 
-      public HonorableExecutionInfo(Mobile from, int swingBonus) : this(from, swingBonus, null, false)
-      {
-      }
-
       public HonorableExecutionInfo(Mobile from, ArrayList mods) : this(from, 0, mods, true)
       {
       }
 
-      public HonorableExecutionInfo(Mobile from, int swingBonus, ArrayList mods, bool penalty)
+      public HonorableExecutionInfo(Mobile from, int swingBonus, ArrayList mods = null, bool penalty = false)
       {
         m_Mobile = from;
         m_SwingBonus = swingBonus;
@@ -152,10 +139,10 @@ namespace Server.Spells.Bushido
         {
           object mod = m_Mods[i];
 
-          if (mod is ResistanceMod)
-            m_Mobile.AddResistanceMod((ResistanceMod)mod);
-          else if (mod is SkillMod)
-            m_Mobile.AddSkillMod((SkillMod)mod);
+          if (mod is ResistanceMod resistanceMod)
+            m_Mobile.AddResistanceMod(resistanceMod);
+          else if (mod is SkillMod skillMod)
+            m_Mobile.AddSkillMod(skillMod);
         }
       }
 
@@ -168,10 +155,10 @@ namespace Server.Spells.Bushido
         {
           object mod = m_Mods[i];
 
-          if (mod is ResistanceMod)
-            m_Mobile.RemoveResistanceMod((ResistanceMod)mod);
-          else if (mod is SkillMod)
-            m_Mobile.RemoveSkillMod((SkillMod)mod);
+          if (mod is ResistanceMod resistanceMod)
+            m_Mobile.RemoveResistanceMod(resistanceMod);
+          else if (mod is SkillMod skillMod)
+            m_Mobile.RemoveSkillMod(skillMod);
         }
       }
     }
diff --git a/Scripts/Spells/Chivalry/CleanseByFire.cs b/Scripts/Spells/Chivalry/CleanseByFire.cs
index 85c49d26a..a12717909 100644
--- a/Scripts/Spells/Chivalry/CleanseByFire.cs
+++ b/Scripts/Spells/Chivalry/CleanseByFire.cs
@@ -113,8 +113,8 @@ namespace Server.Spells.Chivalry
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Chivalry/CloseWounds.cs b/Scripts/Spells/Chivalry/CloseWounds.cs
index 6ebac1ee8..70972eacb 100644
--- a/Scripts/Spells/Chivalry/CloseWounds.cs
+++ b/Scripts/Spells/Chivalry/CloseWounds.cs
@@ -48,7 +48,7 @@ namespace Server.Spells.Chivalry
       {
         Caster.SendLocalizedMessage(1060178); // You are too far away to perform that action!
       }
-      else if (m is BaseCreature && ((BaseCreature)m).IsAnimatedDead)
+      else if (m is BaseCreature creature && creature.IsAnimatedDead)
       {
         Caster.SendLocalizedMessage(1061654); // You cannot heal that which is not alive.
       }
@@ -72,19 +72,12 @@ namespace Server.Spells.Chivalry
          * The caster's Karma affects the amount of damage healed.
          */
 
-        int toHeal = ComputePowerValue(6) + Utility.RandomMinMax(0, 2);
-
         // TODO: Should caps be applied?
-        if (toHeal < 7)
-          toHeal = 7;
-        else if (toHeal > 39)
-          toHeal = 39;
+        int toHeal = Math.Min(Math.Max(ComputePowerValue(6) + Utility.RandomMinMax(0, 2), 7), 39);
 
         if (m.Hits + toHeal > m.HitsMax)
           toHeal = m.HitsMax - m.Hits;
 
-        //m.Hits += toHeal;	//Was previously due to the message
-        //m.Heal( toHeal, Caster, false );
         SpellHelper.Heal(toHeal, m, Caster, false);
 
         m.SendLocalizedMessage(1060203,
@@ -109,8 +102,8 @@ namespace Server.Spells.Chivalry
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Chivalry/ConsecrateWeapon.cs b/Scripts/Spells/Chivalry/ConsecrateWeapon.cs
index da8db66b4..dc5d2f8fb 100644
--- a/Scripts/Spells/Chivalry/ConsecrateWeapon.cs
+++ b/Scripts/Spells/Chivalry/ConsecrateWeapon.cs
@@ -28,9 +28,7 @@ namespace Server.Spells.Chivalry
 
     public override void OnCast()
     {
-      BaseWeapon weapon = Caster.Weapon as BaseWeapon;
-
-      if (weapon == null || weapon is Fists)
+      if (!(Caster.Weapon is BaseWeapon weapon) || weapon is Fists)
       {
         Caster.SendLocalizedMessage(501078); // You must be holding a weapon.
       }
diff --git a/Scripts/Spells/Chivalry/DispelEvil.cs b/Scripts/Spells/Chivalry/DispelEvil.cs
index b5beb5624..ef9b2aeb2 100644
--- a/Scripts/Spells/Chivalry/DispelEvil.cs
+++ b/Scripts/Spells/Chivalry/DispelEvil.cs
@@ -54,13 +54,10 @@ namespace Server.Spells.Chivalry
         for (int i = 0; i < targets.Count; ++i)
         {
           Mobile m = targets[i];
-          BaseCreature bc = m as BaseCreature;
 
-          if (bc != null)
+          if (m is BaseCreature bc)
           {
-            bool dispellable = bc.Summoned && !bc.IsAnimatedDead;
-
-            if (dispellable)
+            if (bc.Summoned && !bc.IsAnimatedDead)
             {
               double dispelChance = (50.0 + 100 * (chiv - bc.DispelDifficulty) / (bc.DispelFocus * 2)) / 100;
               dispelChance *= dispelSkill / 100.0;
diff --git a/Scripts/Spells/Chivalry/EnemyOfOne.cs b/Scripts/Spells/Chivalry/EnemyOfOne.cs
index 1fe6fc28b..8382d357c 100644
--- a/Scripts/Spells/Chivalry/EnemyOfOne.cs
+++ b/Scripts/Spells/Chivalry/EnemyOfOne.cs
@@ -50,13 +50,13 @@ namespace Server.Spells.Chivalry
         m_Table[Caster] = Timer.DelayCall(TimeSpan.FromMinutes(delay), new TimerStateCallback(Expire_Callback),
           Caster);
 
-        if (Caster is PlayerMobile)
+        if (Caster is PlayerMobile mobile)
         {
-          ((PlayerMobile)Caster).EnemyOfOneType = null;
-          ((PlayerMobile)Caster).WaitingForEnemy = true;
+          mobile.EnemyOfOneType = null;
+          mobile.WaitingForEnemy = true;
 
-          BuffInfo.AddBuff(Caster,
-            new BuffInfo(BuffIcon.EnemyOfOne, 1075653, 1044111, TimeSpan.FromMinutes(delay), Caster));
+          BuffInfo.AddBuff(mobile,
+            new BuffInfo(BuffIcon.EnemyOfOne, 1075653, 1044111, TimeSpan.FromMinutes(delay), mobile));
         }
       }
 
@@ -71,10 +71,10 @@ namespace Server.Spells.Chivalry
 
       m.PlaySound(0x1F8);
 
-      if (m is PlayerMobile)
+      if (m is PlayerMobile mobile)
       {
-        ((PlayerMobile)m).EnemyOfOneType = null;
-        ((PlayerMobile)m).WaitingForEnemy = false;
+        mobile.EnemyOfOneType = null;
+        mobile.WaitingForEnemy = false;
       }
     }
   }
diff --git a/Scripts/Spells/Chivalry/NobleSacrifice.cs b/Scripts/Spells/Chivalry/NobleSacrifice.cs
index d40189bb0..3591af33e 100644
--- a/Scripts/Spells/Chivalry/NobleSacrifice.cs
+++ b/Scripts/Spells/Chivalry/NobleSacrifice.cs
@@ -34,7 +34,7 @@ namespace Server.Spells.Chivalry
 
         foreach (Mobile m in Caster.GetMobilesInRange(3)) // TODO: Validate range
         {
-          if (m is BaseCreature && ((BaseCreature)m).IsAnimatedDead)
+          if (m is BaseCreature creature && creature.IsAnimatedDead)
             continue;
 
           if (Caster != m && m.InLOS(Caster) && Caster.CanBeBeneficial(m, false, true) && !(m is Golem))
@@ -54,7 +54,7 @@ namespace Server.Spells.Chivalry
         bool sacrifice = false;
 
         // TODO: Is there really a resurrection chance?
-        double resChance = 0.1 + 0.9 * ((double)Caster.Karma / 10000);
+        double resChance = 0.1 + 0.9 * Caster.Karma / 10000.0d;
 
         for (int i = 0; i < targets.Count; ++i)
         {
diff --git a/Scripts/Spells/Chivalry/RemoveCurse.cs b/Scripts/Spells/Chivalry/RemoveCurse.cs
index f7ac6fe21..7447a942e 100644
--- a/Scripts/Spells/Chivalry/RemoveCurse.cs
+++ b/Scripts/Spells/Chivalry/RemoveCurse.cs
@@ -76,9 +76,7 @@ namespace Server.Spells.Chivalry
           Effects.SendMovingParticles(from, to, 0x2255, 1, 0, false, false, 13, 3, 9501, 1, 0, EffectLayer.Head,
             0x100);
 
-          StatMod mod;
-
-          mod = m.GetStatMod("[Magic] Str Offset");
+          StatMod mod = m.GetStatMod("[Magic] Str Offset");
           if (mod != null && mod.Offset < 0)
             m.RemoveStatMod("[Magic] Str Offset");
 
@@ -130,8 +128,8 @@ namespace Server.Spells.Chivalry
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Chivalry/SacredJourney.cs b/Scripts/Spells/Chivalry/SacredJourney.cs
index d4c6cf058..d4a1beedd 100644
--- a/Scripts/Spells/Chivalry/SacredJourney.cs
+++ b/Scripts/Spells/Chivalry/SacredJourney.cs
@@ -21,11 +21,7 @@ namespace Server.Spells.Chivalry
 
     private RunebookEntry m_Entry;
 
-    public SacredJourneySpell(Mobile caster, Item scroll) : this(caster, scroll, null, null)
-    {
-    }
-
-    public SacredJourneySpell(Mobile caster, Item scroll, RunebookEntry entry, Runebook book) : base(caster, scroll,
+    public SacredJourneySpell(Mobile caster, Item scroll, RunebookEntry entry = null, Runebook book = null) : base(caster, scroll,
       m_Info)
     {
       m_Entry = entry;
@@ -96,9 +92,9 @@ namespace Server.Spells.Chivalry
       else if (!SpellHelper.CheckTravel(Caster, map, loc, TravelCheckType.RecallTo))
       {
       }
-      else if (map == Map.Felucca && Caster is PlayerMobile && ((PlayerMobile)Caster).Young)
+      else if (map == Map.Felucca && Caster is PlayerMobile mobile && mobile.Young)
       {
-        Caster.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
+        mobile.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
       }
       else if (Caster.Kills >= 5 && map != Map.Felucca)
       {
@@ -157,38 +153,32 @@ namespace Server.Spells.Chivalry
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is RecallRune)
+        if (o is RecallRune rune)
         {
-          RecallRune rune = (RecallRune)o;
-
           if (rune.Marked)
             m_Owner.Effect(rune.Target, rune.TargetMap, true);
           else
             from.SendLocalizedMessage(501805); // That rune is not yet marked.
         }
-        else if (o is Runebook)
+        else if (o is Runebook runebook)
         {
-          RunebookEntry e = ((Runebook)o).Default;
+          RunebookEntry e = runebook.Default;
 
           if (e != null)
             m_Owner.Effect(e.Location, e.Map, true);
           else
             from.SendLocalizedMessage(502354); // Target is not marked.
         }
-        else if (o is Key && ((Key)o).KeyValue != 0 && ((Key)o).Link is BaseBoat)
+        else if (o is Key key && key.KeyValue != 0 && key.Link is BaseBoat boat)
         {
-          BaseBoat boat = ((Key)o).Link as BaseBoat;
-
-          if (!boat.Deleted && boat.CheckKey(((Key)o).KeyValue))
+          if (!boat.Deleted && boat.CheckKey(key.KeyValue))
             m_Owner.Effect(boat.GetMarkedLocation(), boat.Map, false);
           else
             from.Send(new MessageLocalized(from.Serial, from.Body, MessageType.Regular, 0x3B2, 3, 502357,
               from.Name, "")); // I can not recall from that object.
         }
-        else if (o is HouseRaffleDeed && ((HouseRaffleDeed)o).ValidLocation())
+        else if (o is HouseRaffleDeed deed && deed.ValidLocation())
         {
-          HouseRaffleDeed deed = (HouseRaffleDeed)o;
-
           m_Owner.Effect(deed.PlotLocation, deed.PlotFacet, true);
         }
         else
diff --git a/Scripts/Spells/Eighth/EnergyVortex.cs b/Scripts/Spells/Eighth/EnergyVortex.cs
index 77075b338..86dbed550 100644
--- a/Scripts/Spells/Eighth/EnergyVortex.cs
+++ b/Scripts/Spells/Eighth/EnergyVortex.cs
@@ -78,8 +78,8 @@ namespace Server.Spells.Eighth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetOutOfLOS(Mobile from, object o)
diff --git a/Scripts/Spells/Eighth/Resurrection.cs b/Scripts/Spells/Eighth/Resurrection.cs
index eb79f5642..34b350685 100644
--- a/Scripts/Spells/Eighth/Resurrection.cs
+++ b/Scripts/Spells/Eighth/Resurrection.cs
@@ -98,7 +98,8 @@ namespace Server.Spells.Eighth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fifth/BladeSpirits.cs b/Scripts/Spells/Fifth/BladeSpirits.cs
index 6977c4196..a402371ed 100644
--- a/Scripts/Spells/Fifth/BladeSpirits.cs
+++ b/Scripts/Spells/Fifth/BladeSpirits.cs
@@ -85,8 +85,8 @@ namespace Server.Spells.Fifth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetOutOfLOS(Mobile from, object o)
diff --git a/Scripts/Spells/Fifth/DispelField.cs b/Scripts/Spells/Fifth/DispelField.cs
index 679231614..3e8536a0b 100644
--- a/Scripts/Spells/Fifth/DispelField.cs
+++ b/Scripts/Spells/Fifth/DispelField.cs
@@ -40,7 +40,7 @@ namespace Server.Spells.Fifth
       {
         Caster.SendLocalizedMessage(1005049); // That cannot be dispelled.
       }
-      else if (item is Moongate && !((Moongate)item).Dispellable)
+      else if (item is Moongate moongate && !moongate.Dispellable)
       {
         Caster.SendLocalizedMessage(1005047); // That magic is too chaotic
       }
@@ -69,8 +69,8 @@ namespace Server.Spells.Fifth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Item)
-          m_Owner.Target((Item)o);
+        if (o is Item item)
+          m_Owner.Target(item);
         else
           m_Owner.Caster.SendLocalizedMessage(1005049); // That cannot be dispelled.
       }
diff --git a/Scripts/Spells/Fifth/MindBlast.cs b/Scripts/Spells/Fifth/MindBlast.cs
index 55ebb2689..559fe882e 100644
--- a/Scripts/Spells/Fifth/MindBlast.cs
+++ b/Scripts/Spells/Fifth/MindBlast.cs
@@ -141,8 +141,8 @@ namespace Server.Spells.Fifth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fifth/Paralyze.cs b/Scripts/Spells/Fifth/Paralyze.cs
index 253f1fe5e..56cf9727f 100644
--- a/Scripts/Spells/Fifth/Paralyze.cs
+++ b/Scripts/Spells/Fifth/Paralyze.cs
@@ -71,9 +71,9 @@ namespace Server.Spells.Fifth
             duration *= 0.75;
         }
 
-        if (m is PlagueBeastLord)
+        if (m is PlagueBeastLord lord)
         {
-          ((PlagueBeastLord)m).OnParalyzed(Caster);
+          lord.OnParalyzed(Caster);
           duration = 120;
         }
 
@@ -99,8 +99,8 @@ namespace Server.Spells.Fifth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fifth/PoisonField.cs b/Scripts/Spells/Fifth/PoisonField.cs
index b35c3dde7..941c92326 100644
--- a/Scripts/Spells/Fifth/PoisonField.cs
+++ b/Scripts/Spells/Fifth/PoisonField.cs
@@ -281,8 +281,8 @@ namespace Server.Spells.Fifth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/First/Clumsy.cs b/Scripts/Spells/First/Clumsy.cs
index e4bcea5a1..7310a5a67 100644
--- a/Scripts/Spells/First/Clumsy.cs
+++ b/Scripts/Spells/First/Clumsy.cs
@@ -67,7 +67,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/First/Feeblemind.cs b/Scripts/Spells/First/Feeblemind.cs
index 160d4008e..b8498ad78 100644
--- a/Scripts/Spells/First/Feeblemind.cs
+++ b/Scripts/Spells/First/Feeblemind.cs
@@ -67,7 +67,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/First/Heal.cs b/Scripts/Spells/First/Heal.cs
index 4e251300a..57dd26eff 100644
--- a/Scripts/Spells/First/Heal.cs
+++ b/Scripts/Spells/First/Heal.cs
@@ -49,7 +49,7 @@ namespace Server.Spells.First
       {
         Caster.SendLocalizedMessage(1060177); // You cannot heal a creature that is already dead!
       }
-      else if (m is BaseCreature && ((BaseCreature)m).IsAnimatedDead)
+      else if (m is BaseCreature creature && creature.IsAnimatedDead)
       {
         Caster.SendLocalizedMessage(1061654); // You cannot heal that which is not alive.
       }
@@ -102,7 +102,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/First/MagicArrow.cs b/Scripts/Spells/First/MagicArrow.cs
index 793214eba..e19dc80d7 100644
--- a/Scripts/Spells/First/MagicArrow.cs
+++ b/Scripts/Spells/First/MagicArrow.cs
@@ -80,7 +80,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/First/NightSight.cs b/Scripts/Spells/First/NightSight.cs
index b1f796e27..79ba72b43 100644
--- a/Scripts/Spells/First/NightSight.cs
+++ b/Scripts/Spells/First/NightSight.cs
@@ -34,10 +34,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object targeted)
       {
-        if (targeted is Mobile && m_Spell.CheckBSequence((Mobile)targeted))
+        if (targeted is Mobile targ && m_Spell.CheckBSequence(targ))
         {
-          Mobile targ = (Mobile)targeted;
-
           SpellHelper.Turn(m_Spell.Caster, targ);
 
           if (targ.BeginAction(typeof(LightCycle)))
diff --git a/Scripts/Spells/First/Weaken.cs b/Scripts/Spells/First/Weaken.cs
index cd3acfb8f..d553639c4 100644
--- a/Scripts/Spells/First/Weaken.cs
+++ b/Scripts/Spells/First/Weaken.cs
@@ -67,7 +67,8 @@ namespace Server.Spells.First
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/ArchCure.cs b/Scripts/Spells/Fourth/ArchCure.cs
index 074666067..26faa81c2 100644
--- a/Scripts/Spells/Fourth/ArchCure.cs
+++ b/Scripts/Spells/Fourth/ArchCure.cs
@@ -170,9 +170,7 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Fourth/ArchProtection.cs b/Scripts/Spells/Fourth/ArchProtection.cs
index 5bee6953d..56ad0133c 100644
--- a/Scripts/Spells/Fourth/ArchProtection.cs
+++ b/Scripts/Spells/Fourth/ArchProtection.cs
@@ -152,9 +152,7 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Fourth/Curse.cs b/Scripts/Spells/Fourth/Curse.cs
index 7c5fd0587..12cb41452 100644
--- a/Scripts/Spells/Fourth/Curse.cs
+++ b/Scripts/Spells/Fourth/Curse.cs
@@ -66,7 +66,7 @@ namespace Server.Spells.Fourth
         ) //On OSI you CAN curse yourself and get this effect.
         {
           TimeSpan duration = SpellHelper.GetDuration(Caster, m);
-          m_UnderEffect[m] = t = Timer.DelayCall(duration, new TimerStateCallback(RemoveEffect), m);
+          m_UnderEffect[m] = Timer.DelayCall(duration, new TimerStateCallback(RemoveEffect), m);
           m.UpdateResistances();
         }
 
@@ -101,8 +101,8 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/FireField.cs b/Scripts/Spells/Fourth/FireField.cs
index 0a284d9b5..7f4278d78 100644
--- a/Scripts/Spells/Fourth/FireField.cs
+++ b/Scripts/Spells/Fourth/FireField.cs
@@ -246,36 +246,36 @@ namespace Server.Spells.Fourth
             Map map = m_Item.Map;
             Mobile caster = m_Item.m_Caster;
 
-            if (map != null && caster != null)
+            if (map == null || caster == null)
+              return;
+            
+            foreach (Mobile m in m_Item.GetMobilesInRange(0))
+              if (m.Z + 16 > m_Item.Z && m_Item.Z + 12 > m.Z && (!Core.AOS || m != caster) &&
+                  SpellHelper.ValidIndirectTarget(caster, m) && caster.CanBeHarmful(m, false))
+                m_Queue.Enqueue(m);
+
+            while (m_Queue.Count > 0)
             {
-              foreach (Mobile m in m_Item.GetMobilesInRange(0))
-                if (m.Z + 16 > m_Item.Z && m_Item.Z + 12 > m.Z && (!Core.AOS || m != caster) &&
-                    SpellHelper.ValidIndirectTarget(caster, m) && caster.CanBeHarmful(m, false))
-                  m_Queue.Enqueue(m);
+              Mobile m = (Mobile)m_Queue.Dequeue();
 
-              while (m_Queue.Count > 0)
+              if (SpellHelper.CanRevealCaster(m))
+                caster.RevealingAction();
+
+              caster.DoHarmful(m);
+
+              int damage = m_Item.m_Damage;
+
+              if (!Core.AOS && m.CheckSkill(SkillName.MagicResist, 0.0, 30.0))
               {
-                Mobile m = (Mobile)m_Queue.Dequeue();
+                damage = 1;
 
-                if (SpellHelper.CanRevealCaster(m))
-                  caster.RevealingAction();
-
-                caster.DoHarmful(m);
-
-                int damage = m_Item.m_Damage;
-
-                if (!Core.AOS && m.CheckSkill(SkillName.MagicResist, 0.0, 30.0))
-                {
-                  damage = 1;
-
-                  m.SendLocalizedMessage(501783); // You feel yourself resisting magical energy.
-                }
-
-                AOS.Damage(m, caster, damage, 0, 100, 0, 0, 0);
-                m.PlaySound(0x208);
-
-                (m as BaseCreature)?.OnHarmfulSpell(caster);
+                m.SendLocalizedMessage(501783); // You feel yourself resisting magical energy.
               }
+
+              AOS.Damage(m, caster, damage, 0, 100, 0, 0, 0);
+              m.PlaySound(0x208);
+
+              (m as BaseCreature)?.OnHarmfulSpell(caster);
             }
           }
         }
@@ -293,8 +293,8 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/GreaterHeal.cs b/Scripts/Spells/Fourth/GreaterHeal.cs
index 5f2273545..f76cfeaa0 100644
--- a/Scripts/Spells/Fourth/GreaterHeal.cs
+++ b/Scripts/Spells/Fourth/GreaterHeal.cs
@@ -46,7 +46,7 @@ namespace Server.Spells.Fourth
       {
         Caster.SendLocalizedMessage(500237); // Target can not be seen.
       }
-      else if (m is BaseCreature && ((BaseCreature)m).IsAnimatedDead)
+      else if (m is BaseCreature creature && creature.IsAnimatedDead)
       {
         Caster.SendLocalizedMessage(1061654); // You cannot heal that which is not alive.
       }
@@ -92,7 +92,8 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/Lightning.cs b/Scripts/Spells/Fourth/Lightning.cs
index ca2093cb3..163fcae79 100644
--- a/Scripts/Spells/Fourth/Lightning.cs
+++ b/Scripts/Spells/Fourth/Lightning.cs
@@ -76,8 +76,8 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/ManaDrain.cs b/Scripts/Spells/Fourth/ManaDrain.cs
index e66676a7e..355d617e0 100644
--- a/Scripts/Spells/Fourth/ManaDrain.cs
+++ b/Scripts/Spells/Fourth/ManaDrain.cs
@@ -120,8 +120,8 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Fourth/Recall.cs b/Scripts/Spells/Fourth/Recall.cs
index 8bf37ed50..e3c86baa7 100644
--- a/Scripts/Spells/Fourth/Recall.cs
+++ b/Scripts/Spells/Fourth/Recall.cs
@@ -24,11 +24,7 @@ namespace Server.Spells.Fourth
 
     private RunebookEntry m_Entry;
 
-    public RecallSpell(Mobile caster, Item scroll) : this(caster, scroll, null, null)
-    {
-    }
-
-    public RecallSpell(Mobile caster, Item scroll, RunebookEntry entry, Runebook book) : base(caster, scroll, m_Info)
+    public RecallSpell(Mobile caster, Item scroll, RunebookEntry entry = null, Runebook book = null) : base(caster, scroll, m_Info)
     {
       m_Entry = entry;
       m_Book = book;
@@ -99,9 +95,9 @@ namespace Server.Spells.Fourth
       else if (!SpellHelper.CheckTravel(Caster, map, loc, TravelCheckType.RecallTo))
       {
       }
-      else if (map == Map.Felucca && Caster is PlayerMobile && ((PlayerMobile)Caster).Young)
+      else if (map == Map.Felucca && Caster is PlayerMobile mobile && mobile.Young)
       {
-        Caster.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
+        mobile.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
       }
       else if (Caster.Kills >= 5 && map != Map.Felucca)
       {
@@ -159,38 +155,32 @@ namespace Server.Spells.Fourth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is RecallRune)
+        if (o is RecallRune rune)
         {
-          RecallRune rune = (RecallRune)o;
-
           if (rune.Marked)
             m_Owner.Effect(rune.Target, rune.TargetMap, true);
           else
             from.SendLocalizedMessage(501805); // That rune is not yet marked.
         }
-        else if (o is Runebook)
+        else if (o is Runebook runebook)
         {
-          RunebookEntry e = ((Runebook)o).Default;
+          RunebookEntry e = runebook.Default;
 
           if (e != null)
             m_Owner.Effect(e.Location, e.Map, true);
           else
             from.SendLocalizedMessage(502354); // Target is not marked.
         }
-        else if (o is Key && ((Key)o).KeyValue != 0 && ((Key)o).Link is BaseBoat)
+        else if (o is Key key && key.KeyValue != 0 && key.Link is BaseBoat boat)
         {
-          BaseBoat boat = ((Key)o).Link as BaseBoat;
-
-          if (!boat.Deleted && boat.CheckKey(((Key)o).KeyValue))
+          if (!boat.Deleted && boat.CheckKey(key.KeyValue))
             m_Owner.Effect(boat.GetMarkedLocation(), boat.Map, false);
           else
             from.Send(new MessageLocalized(from.Serial, from.Body, MessageType.Regular, 0x3B2, 3, 502357,
               from.Name, "")); // I can not recall from that object.
         }
-        else if (o is HouseRaffleDeed && ((HouseRaffleDeed)o).ValidLocation())
+        else if (o is HouseRaffleDeed deed && deed.ValidLocation())
         {
-          HouseRaffleDeed deed = (HouseRaffleDeed)o;
-
           m_Owner.Effect(deed.PlotLocation, deed.PlotFacet, true);
         }
         else
diff --git a/Scripts/Spells/Mysticism/AnimatedWeaponSpell.cs b/Scripts/Spells/Mysticism/AnimatedWeaponSpell.cs
index 224b7ffaf..563cf0168 100644
--- a/Scripts/Spells/Mysticism/AnimatedWeaponSpell.cs
+++ b/Scripts/Spells/Mysticism/AnimatedWeaponSpell.cs
@@ -76,8 +76,8 @@ namespace Server.Spells.Mysticism
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Mysticism/EagleStrikeSpell.cs b/Scripts/Spells/Mysticism/EagleStrikeSpell.cs
index 39941eb52..5872252c0 100644
--- a/Scripts/Spells/Mysticism/EagleStrikeSpell.cs
+++ b/Scripts/Spells/Mysticism/EagleStrikeSpell.cs
@@ -75,8 +75,8 @@ namespace Server.Spells.Mysticism
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Mysticism/HailStormSpell.cs b/Scripts/Spells/Mysticism/HailStormSpell.cs
index 1838ef98f..ef5040d8c 100644
--- a/Scripts/Spells/Mysticism/HailStormSpell.cs
+++ b/Scripts/Spells/Mysticism/HailStormSpell.cs
@@ -43,8 +43,8 @@ namespace Server.Spells.Mysticism
 
         SpellHelper.Turn(Caster, p);
 
-        if (p is Item)
-          p = ((Item)p).GetWorldLocation();
+        if (p is Item item)
+          p = item.GetWorldLocation();
 
         List<Mobile> targets = new List<Mobile>();
 
@@ -131,9 +131,7 @@ namespace Server.Spells.Mysticism
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Mysticism/NetherCycloneSpell.cs b/Scripts/Spells/Mysticism/NetherCycloneSpell.cs
index ac63b8e72..675b2ac98 100644
--- a/Scripts/Spells/Mysticism/NetherCycloneSpell.cs
+++ b/Scripts/Spells/Mysticism/NetherCycloneSpell.cs
@@ -46,8 +46,8 @@ namespace Server.Spells.Mysticism
 
         SpellHelper.Turn(Caster, p);
 
-        if (p is Item)
-          p = ((Item)p).GetWorldLocation();
+        if (p is Item item)
+          p = item.GetWorldLocation();
 
         List<Mobile> targets = new List<Mobile>();
 
@@ -83,11 +83,7 @@ namespace Server.Spells.Mysticism
         foreach (Mobile m in targets)
         {
           Caster.DoHarmful(m);
-
-          int[] types = new int[4];
-          types[Utility.Random(types.Length)] = 100;
-
-          SpellHelper.Damage(this, m, damage, 0, types[0], types[1], types[2], types[3]);
+          SpellHelper.Damage(this, m, damage, 0, 0, 0, 0, 0, 100);
 
           double resistedReduction = reduction - m.Skills[SkillName.MagicResist].Value / 800.0;
 
diff --git a/Scripts/Spells/Mysticism/SpellPlagueSpell.cs b/Scripts/Spells/Mysticism/SpellPlagueSpell.cs
index 397b167d1..e6e3fc4a9 100644
--- a/Scripts/Spells/Mysticism/SpellPlagueSpell.cs
+++ b/Scripts/Spells/Mysticism/SpellPlagueSpell.cs
@@ -63,11 +63,7 @@ namespace Server.Spells.Mysticism
         VisualEffect(targeted);
 
         int damage = GetNewAosDamage(33, 1, 5, targeted);
-
-        int[] types = new int[4];
-        types[Utility.Random(types.Length)] = 100;
-
-        SpellHelper.Damage(this, targeted, damage, 0, types[0], types[1], types[2], types[3]);
+        SpellHelper.Damage(this, targeted, damage, 0, 0, 0, 0, 0);
 
         SpellPlagueContext context = new SpellPlagueContext(this, targeted);
 
@@ -176,10 +172,7 @@ namespace Server.Spells.Mysticism
             m_Explosions++;
             m_LastExploded = DateTime.Now;
 
-            int[] types = new int[4];
-            types[Utility.Random(types.Length)] = 100;
-
-            SpellHelper.Damage(m_Owner, m_Target, damage, 0, types[0], types[1], types[2], types[3]);
+            SpellHelper.Damage(m_Owner, m_Target, damage, 0, 0, 0, 0, 0, 100);
 
             if (m_Explosions >= 3)
               EndPlague();
@@ -222,8 +215,8 @@ namespace Server.Spells.Mysticism
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Necromancy/AnimateDeadSpell.cs b/Scripts/Spells/Necromancy/AnimateDeadSpell.cs
index 3b18ea952..fdedad3e1 100644
--- a/Scripts/Spells/Necromancy/AnimateDeadSpell.cs
+++ b/Scripts/Spells/Necromancy/AnimateDeadSpell.cs
@@ -132,9 +132,7 @@ namespace Server.Spells.Necromancy
     {
       MaabusCoffinComponent comp = obj as MaabusCoffinComponent;
 
-      MaabusCoffin addon = comp?.Addon as MaabusCoffin;
-
-      if (addon != null)
+      if (comp?.Addon is MaabusCoffin addon)
       {
         PlayerMobile pm = Caster as PlayerMobile;
 
@@ -154,9 +152,7 @@ namespace Server.Spells.Necromancy
         return;
       }
 
-      Corpse c = obj as Corpse;
-
-      if (c == null)
+      if (!(obj is Corpse c))
       {
         Caster.SendLocalizedMessage(1061084); // You cannot animate that.
       }
@@ -167,8 +163,8 @@ namespace Server.Spells.Necromancy
         if (c.Owner != null) type = c.Owner.GetType();
 
         if (c.ItemID != 0x2006 || c.Animated || type == typeof(PlayerMobile) || type == null ||
-            c.Owner != null && c.Owner.Fame < 100 || c.Owner is BaseCreature &&
-            (((BaseCreature)c.Owner).Summoned || ((BaseCreature)c.Owner).IsBonded))
+            c.Owner != null && c.Owner.Fame < 100 || c.Owner is BaseCreature creature &&
+            (creature.Summoned || creature.IsBonded))
         {
           Caster.SendLocalizedMessage(1061085); // There's not enough life force there to animate.
         }
@@ -326,25 +322,20 @@ namespace Server.Spells.Necromancy
       if (summoned == null)
         return;
 
-      if (summoned is BaseCreature)
+      if (summoned is BaseCreature bc)
       {
-        BaseCreature bc = (BaseCreature)summoned;
-
         // to be sure
         bc.Tamable = false;
 
-        if (bc is BaseMount)
-          bc.ControlSlots = 1;
-        else
-          bc.ControlSlots = 0;
+        bc.ControlSlots = bc is BaseMount ? 1 : 0;
 
         Effects.PlaySound(loc, map, bc.GetAngerSound());
 
-        BaseCreature.Summon((BaseCreature)summoned, false, caster, loc, 0x28, TimeSpan.FromDays(1.0));
+        BaseCreature.Summon(bc, false, caster, loc, 0x28, TimeSpan.FromDays(1.0));
       }
 
-      if (summoned is SkeletalDragon)
-        Scale((SkeletalDragon)summoned, 50); // lose 50% hp and strength
+      if (summoned is SkeletalDragon dragon)
+        Scale(dragon, 50); // lose 50% hp and strength
 
       summoned.Fame = 0;
       summoned.Karma = -1500;
@@ -359,9 +350,7 @@ namespace Server.Spells.Necromancy
 
     public static void Scale(BaseCreature bc, int scalar)
     {
-      int toScale;
-
-      toScale = bc.RawStr;
+      int toScale = bc.RawStr;
       bc.RawStr = AOS.Scale(toScale, scalar);
 
       toScale = bc.HitsMaxSeed;
diff --git a/Scripts/Spells/Necromancy/BloodOathSpell.cs b/Scripts/Spells/Necromancy/BloodOathSpell.cs
index 3a45af9db..0deee24ff 100644
--- a/Scripts/Spells/Necromancy/BloodOathSpell.cs
+++ b/Scripts/Spells/Necromancy/BloodOathSpell.cs
@@ -173,8 +173,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
         else
           from.SendLocalizedMessage(1060508); // You can't curse that.
       }
diff --git a/Scripts/Spells/Necromancy/CorpseSkin.cs b/Scripts/Spells/Necromancy/CorpseSkin.cs
index eb8b7cd2f..ff39fb6a0 100644
--- a/Scripts/Spells/Necromancy/CorpseSkin.cs
+++ b/Scripts/Spells/Necromancy/CorpseSkin.cs
@@ -141,8 +141,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Necromancy/CurseWeapon.cs b/Scripts/Spells/Necromancy/CurseWeapon.cs
index 45272f17a..9d550b85c 100644
--- a/Scripts/Spells/Necromancy/CurseWeapon.cs
+++ b/Scripts/Spells/Necromancy/CurseWeapon.cs
@@ -26,9 +26,7 @@ namespace Server.Spells.Necromancy
 
     public override void OnCast()
     {
-      BaseWeapon weapon = Caster.Weapon as BaseWeapon;
-
-      if (weapon == null || weapon is Fists)
+      if (!(Caster.Weapon is BaseWeapon weapon) || weapon is Fists)
       {
         Caster.SendLocalizedMessage(501078); // You must be holding a weapon.
       }
diff --git a/Scripts/Spells/Necromancy/EvilOmen.cs b/Scripts/Spells/Necromancy/EvilOmen.cs
index acfc578dd..6caad743f 100644
--- a/Scripts/Spells/Necromancy/EvilOmen.cs
+++ b/Scripts/Spells/Necromancy/EvilOmen.cs
@@ -116,8 +116,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
         else
           from.SendLocalizedMessage(1060508); // You can't curse that.
       }
diff --git a/Scripts/Spells/Necromancy/Exorcism.cs b/Scripts/Spells/Necromancy/Exorcism.cs
index 462c72376..365dcd0b6 100644
--- a/Scripts/Spells/Necromancy/Exorcism.cs
+++ b/Scripts/Spells/Necromancy/Exorcism.cs
@@ -87,9 +87,7 @@ namespace Server.Spells.Necromancy
 
     public override void OnCast()
     {
-      ChampionSpawnRegion r = Caster.Region.GetRegion(typeof(ChampionSpawnRegion)) as ChampionSpawnRegion;
-
-      if (r == null || !Caster.InRange(r.ChampionSpawn, Range))
+      if (!(Caster.Region.GetRegion(typeof(ChampionSpawnRegion)) is ChampionSpawnRegion r) || !Caster.InRange(r.ChampionSpawn, Range))
       {
         Caster.SendLocalizedMessage(1072111); // You are not in a valid exorcism region.
       }
diff --git a/Scripts/Spells/Necromancy/MindRot.cs b/Scripts/Spells/Necromancy/MindRot.cs
index bc4e271e7..b56963e93 100644
--- a/Scripts/Spells/Necromancy/MindRot.cs
+++ b/Scripts/Spells/Necromancy/MindRot.cs
@@ -120,8 +120,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
         else
           from.SendLocalizedMessage(1060508); // You can't curse that.
       }
@@ -135,14 +135,12 @@ namespace Server.Spells.Necromancy
 
   public class MRExpireTimer : Timer
   {
-    private Mobile m_Caster;
     private DateTime m_End;
     private Mobile m_Target;
 
     public MRExpireTimer(Mobile caster, Mobile target, TimeSpan delay) : base(TimeSpan.FromSeconds(1.0),
       TimeSpan.FromSeconds(1.0))
     {
-      m_Caster = caster;
       m_Target = target;
       m_End = DateTime.UtcNow + delay;
       Priority = TimerPriority.TwoFiftyMS;
diff --git a/Scripts/Spells/Necromancy/PainSpike.cs b/Scripts/Spells/Necromancy/PainSpike.cs
index bb90436a0..adeaefb0a 100644
--- a/Scripts/Spells/Necromancy/PainSpike.cs
+++ b/Scripts/Spells/Necromancy/PainSpike.cs
@@ -39,7 +39,7 @@ namespace Server.Spells.Necromancy
       {
         SpellHelper.Turn(Caster, m);
 
-        //SpellHelper.CheckReflect( (int)this.Circle, Caster, ref m ); //Irrelevent asfter AoS
+        //SpellHelper.CheckReflect( (int)this.Circle, Caster, ref m ); //Irrelevent after AoS
 
         /* Temporarily causes intense physical pain to the target, dealing direct damage.
          * After 10 seconds the spell wears off, and if the target is still alive,
@@ -61,9 +61,8 @@ namespace Server.Spells.Necromancy
         if (m_Table.Contains(m))
         {
           damage = Utility.RandomMinMax(3, 7);
-          Timer t = m_Table[m] as Timer;
 
-          if (t != null)
+          if (m_Table[m] is Timer t)
           {
             t.Delay += TimeSpan.FromSeconds(2.0);
 
@@ -77,6 +76,7 @@ namespace Server.Spells.Necromancy
 
         BuffInfo.AddBuff(m, new BuffInfo(BuffIcon.PainSpike, 1075667, buffTime, m, Convert.ToString((int)damage)));
 
+        // TODO: Find a better way to do this
         WeightOverloading.DFA = DFAlgorithm.PainSpike;
         m.Damage((int)damage, Caster);
         SpellHelper.DoLeech((int)damage, Caster, m);
@@ -126,8 +126,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Necromancy/PoisonStrike.cs b/Scripts/Spells/Necromancy/PoisonStrike.cs
index 4e170854a..47f085182 100644
--- a/Scripts/Spells/Necromancy/PoisonStrike.cs
+++ b/Scripts/Spells/Necromancy/PoisonStrike.cs
@@ -107,8 +107,8 @@ namespace Server.Spells.Necromancy
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Ninjitsu/KiAttack.cs b/Scripts/Spells/Ninjitsu/KiAttack.cs
index 598ff3035..7a8b02cde 100644
--- a/Scripts/Spells/Ninjitsu/KiAttack.cs
+++ b/Scripts/Spells/Ninjitsu/KiAttack.cs
@@ -33,18 +33,12 @@ namespace Server.Spells.Ninjitsu
         return false;
       }
 
-      if (Core.ML)
+      if (Core.ML && @from.Weapon is BaseRanged)
       {
-        BaseRanged ranged = from.Weapon as BaseRanged;
-
-        if (ranged != null)
-        {
-          from.SendLocalizedMessage(1075858); // You can only use this with melee attacks.
-          return false;
-        }
+        from.SendLocalizedMessage(1075858); // You can only use this with melee attacks.
+        return false;
       }
-
-
+      
       return base.Validate(from);
     }
 
@@ -86,9 +80,7 @@ namespace Server.Spells.Ninjitsu
 
     public override void OnClearMove(Mobile from)
     {
-      KiAttackInfo info = m_Table[from] as KiAttackInfo;
-
-      if (info != null)
+      if (m_Table[@from] is KiAttackInfo info)
       {
         info.m_Timer?.Stop();
 
@@ -98,9 +90,7 @@ namespace Server.Spells.Ninjitsu
 
     public static double GetBonus(Mobile from)
     {
-      KiAttackInfo info = m_Table[from] as KiAttackInfo;
-
-      if (info == null)
+      if (!(m_Table[@from] is KiAttackInfo info))
         return 0.0;
 
       int xDelta = info.m_Location.X - from.X;
diff --git a/Scripts/Spells/Ninjitsu/ShadowJump.cs b/Scripts/Spells/Ninjitsu/ShadowJump.cs
index 3adf25249..123c49f40 100644
--- a/Scripts/Spells/Ninjitsu/ShadowJump.cs
+++ b/Scripts/Spells/Ninjitsu/ShadowJump.cs
@@ -122,9 +122,7 @@ namespace Server.Spells.Ninjitsu
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Ninjitsu/SurpriseAttack.cs b/Scripts/Spells/Ninjitsu/SurpriseAttack.cs
index e7854e830..3228aee88 100644
--- a/Scripts/Spells/Ninjitsu/SurpriseAttack.cs
+++ b/Scripts/Spells/Ninjitsu/SurpriseAttack.cs
@@ -86,9 +86,7 @@ namespace Server.Spells.Ninjitsu
 
     public static bool GetMalus(Mobile target, ref int malus)
     {
-      SurpriseAttackInfo info = m_Table[target] as SurpriseAttackInfo;
-
-      if (info == null)
+      if (!(m_Table[target] is SurpriseAttackInfo info))
         return false;
 
       malus = info.m_Malus;
diff --git a/Scripts/Spells/Second/Agility.cs b/Scripts/Spells/Second/Agility.cs
index 4a2941f6c..8966241df 100644
--- a/Scripts/Spells/Second/Agility.cs
+++ b/Scripts/Spells/Second/Agility.cs
@@ -71,7 +71,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Second/Cunning.cs b/Scripts/Spells/Second/Cunning.cs
index 6b1659e09..465c8ae55 100644
--- a/Scripts/Spells/Second/Cunning.cs
+++ b/Scripts/Spells/Second/Cunning.cs
@@ -71,7 +71,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Second/Cure.cs b/Scripts/Spells/Second/Cure.cs
index 56bd9aac5..ac336ed72 100644
--- a/Scripts/Spells/Second/Cure.cs
+++ b/Scripts/Spells/Second/Cure.cs
@@ -87,7 +87,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Second/Harm.cs b/Scripts/Spells/Second/Harm.cs
index ef6db5836..b228e84a0 100644
--- a/Scripts/Spells/Second/Harm.cs
+++ b/Scripts/Spells/Second/Harm.cs
@@ -25,13 +25,11 @@ namespace Server.Spells.Second
       Caster.Target = new InternalTarget(this);
     }
 
-
     public override double GetSlayerDamageScalar(Mobile target)
     {
       return 1.0; //This spell isn't affected by slayer spellbooks
     }
 
-
     public void Target(Mobile m)
     {
       if (!Caster.CanSee(m))
@@ -97,7 +95,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Second/MagicTrap.cs b/Scripts/Spells/Second/MagicTrap.cs
index 06a675ead..543288c9a 100644
--- a/Scripts/Spells/Second/MagicTrap.cs
+++ b/Scripts/Spells/Second/MagicTrap.cs
@@ -78,8 +78,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is TrappableContainer)
-          m_Owner.Target((TrappableContainer)o);
+        if (o is TrappableContainer container)
+          m_Owner.Target(container);
         else
           from.SendMessage("You can't trap that");
       }
diff --git a/Scripts/Spells/Second/RemoveTrap.cs b/Scripts/Spells/Second/RemoveTrap.cs
index ff652357d..20651770f 100644
--- a/Scripts/Spells/Second/RemoveTrap.cs
+++ b/Scripts/Spells/Second/RemoveTrap.cs
@@ -64,8 +64,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is TrappableContainer)
-          m_Owner.Target((TrappableContainer)o);
+        if (o is TrappableContainer container)
+          m_Owner.Target(container);
         else
           from.SendMessage("You can't disarm that");
       }
diff --git a/Scripts/Spells/Second/Strength.cs b/Scripts/Spells/Second/Strength.cs
index c6033bb97..0e36eef11 100644
--- a/Scripts/Spells/Second/Strength.cs
+++ b/Scripts/Spells/Second/Strength.cs
@@ -71,7 +71,8 @@ namespace Server.Spells.Second
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Seventh/ChainLightning.cs b/Scripts/Spells/Seventh/ChainLightning.cs
index b82a66550..860431ffe 100644
--- a/Scripts/Spells/Seventh/ChainLightning.cs
+++ b/Scripts/Spells/Seventh/ChainLightning.cs
@@ -39,8 +39,8 @@ namespace Server.Spells.Seventh
       {
         SpellHelper.Turn(Caster, p);
 
-        if (p is Item)
-          p = ((Item)p).GetWorldLocation();
+        if (p is Item item)
+          p = item.GetWorldLocation();
 
         List<Mobile> targets = new List<Mobile>();
 
@@ -86,10 +86,9 @@ namespace Server.Spells.Seventh
           else if (!Core.AOS)
             damage /= targets.Count;
 
-          double toDeal;
           for (int i = 0; i < targets.Count; ++i)
           {
-            toDeal = damage;
+            double toDeal = damage;
             Mobile m = targets[i];
 
             if (!Core.AOS && CheckResisted(m))
@@ -126,9 +125,7 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Seventh/EnergyField.cs b/Scripts/Spells/Seventh/EnergyField.cs
index 71040c27e..0358c223d 100644
--- a/Scripts/Spells/Seventh/EnergyField.cs
+++ b/Scripts/Spells/Seventh/EnergyField.cs
@@ -188,8 +188,8 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Seventh/FlameStrike.cs b/Scripts/Spells/Seventh/FlameStrike.cs
index ae41034e6..da64575f5 100644
--- a/Scripts/Spells/Seventh/FlameStrike.cs
+++ b/Scripts/Spells/Seventh/FlameStrike.cs
@@ -77,7 +77,8 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Seventh/GateTravel.cs b/Scripts/Spells/Seventh/GateTravel.cs
index 79e33e82d..5f455055a 100644
--- a/Scripts/Spells/Seventh/GateTravel.cs
+++ b/Scripts/Spells/Seventh/GateTravel.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using Server.Factions;
 using Server.Items;
 using Server.Misc;
@@ -65,19 +66,11 @@ namespace Server.Spells.Seventh
 
     private bool GateExistsAt(Map map, Point3D loc)
     {
-      bool _gateFound = false;
-
       IPooledEnumerable<Item> eable = map.GetItemsInRange(loc, 0);
-      foreach (Item item in eable)
-        if (item is Moongate || item is PublicMoongate)
-        {
-          _gateFound = true;
-          break;
-        }
-
+      bool gateFound = eable.Any(item => item is Moongate || item is PublicMoongate);
       eable.Free();
 
-      return _gateFound;
+      return gateFound;
     }
 
     public void Effect(Point3D loc, Map map, bool checkMulti)
@@ -96,9 +89,9 @@ namespace Server.Spells.Seventh
       else if (!SpellHelper.CheckTravel(Caster, map, loc, TravelCheckType.GateTo))
       {
       }
-      else if (map == Map.Felucca && Caster is PlayerMobile && ((PlayerMobile)Caster).Young)
+      else if (map == Map.Felucca && Caster is PlayerMobile mobile && mobile.Young)
       {
-        Caster.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
+        mobile.SendLocalizedMessage(1049543); // You decide against traveling to Felucca while you are still young.
       }
       else if (Caster.Kills >= 5 && map != Map.Felucca)
       {
@@ -207,18 +200,16 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is RecallRune)
+        if (o is RecallRune rune)
         {
-          RecallRune rune = (RecallRune)o;
-
           if (rune.Marked)
             m_Owner.Effect(rune.Target, rune.TargetMap, true);
           else
             from.SendLocalizedMessage(501803); // That rune is not yet marked.
         }
-        else if (o is Runebook)
+        else if (o is Runebook runebook)
         {
-          RunebookEntry e = ((Runebook)o).Default;
+          RunebookEntry e = runebook.Default;
 
           if (e != null)
             m_Owner.Effect(e.Location, e.Map, true);
@@ -234,10 +225,8 @@ namespace Server.Spells.Seventh
           else
             from.Send( new MessageLocalized( from.Serial, from.Body, MessageType.Regular, 0x3B2, 3, 501030, from.Name, "" ) ); // I can not gate travel from that object.
         }*/
-        else if (o is HouseRaffleDeed && ((HouseRaffleDeed)o).ValidLocation())
+        else if (o is HouseRaffleDeed deed && deed.ValidLocation())
         {
-          HouseRaffleDeed deed = (HouseRaffleDeed)o;
-
           m_Owner.Effect(deed.PlotLocation, deed.PlotFacet, true);
         }
         else
diff --git a/Scripts/Spells/Seventh/ManaVampire.cs b/Scripts/Spells/Seventh/ManaVampire.cs
index 3b6043fdb..932111842 100644
--- a/Scripts/Spells/Seventh/ManaVampire.cs
+++ b/Scripts/Spells/Seventh/ManaVampire.cs
@@ -104,7 +104,7 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Seventh/MassDispel.cs b/Scripts/Spells/Seventh/MassDispel.cs
index 016d5c9f4..513b7fd17 100644
--- a/Scripts/Spells/Seventh/MassDispel.cs
+++ b/Scripts/Spells/Seventh/MassDispel.cs
@@ -59,9 +59,7 @@ namespace Server.Spells.Seventh
         {
           Mobile m = targets[i];
 
-          BaseCreature bc = m as BaseCreature;
-
-          if (bc == null)
+          if (!(m is BaseCreature bc))
             continue;
 
           double dispelChance =
@@ -98,9 +96,7 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Seventh/MeteorSwarm.cs b/Scripts/Spells/Seventh/MeteorSwarm.cs
index 8ded421b3..e75b9cc9a 100644
--- a/Scripts/Spells/Seventh/MeteorSwarm.cs
+++ b/Scripts/Spells/Seventh/MeteorSwarm.cs
@@ -39,8 +39,8 @@ namespace Server.Spells.Seventh
       {
         SpellHelper.Turn(Caster, p);
 
-        if (p is Item)
-          p = ((Item)p).GetWorldLocation();
+        if (p is Item item)
+          p = item.GetWorldLocation();
 
         List<Mobile> targets = new List<Mobile>();
 
@@ -120,9 +120,7 @@ namespace Server.Spells.Seventh
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Sixth/Dispel.cs b/Scripts/Spells/Sixth/Dispel.cs
index bcb39619a..511a62614 100644
--- a/Scripts/Spells/Sixth/Dispel.cs
+++ b/Scripts/Spells/Sixth/Dispel.cs
@@ -37,9 +37,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
+        if (o is Mobile m)
         {
-          Mobile m = (Mobile)o;
           BaseCreature bc = m as BaseCreature;
 
           if (!from.CanSee(m))
diff --git a/Scripts/Spells/Sixth/EnergyBolt.cs b/Scripts/Spells/Sixth/EnergyBolt.cs
index b95b5a3d3..bfbd02fa9 100644
--- a/Scripts/Spells/Sixth/EnergyBolt.cs
+++ b/Scripts/Spells/Sixth/EnergyBolt.cs
@@ -82,8 +82,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Sixth/Explosion.cs b/Scripts/Spells/Sixth/Explosion.cs
index b667bf028..4d27b9a14 100644
--- a/Scripts/Spells/Sixth/Explosion.cs
+++ b/Scripts/Spells/Sixth/Explosion.cs
@@ -115,8 +115,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Sixth/Invisibility.cs b/Scripts/Spells/Sixth/Invisibility.cs
index 9f88a2c38..f5f5faf32 100644
--- a/Scripts/Spells/Sixth/Invisibility.cs
+++ b/Scripts/Spells/Sixth/Invisibility.cs
@@ -47,7 +47,7 @@ namespace Server.Spells.Sixth
       {
         Caster.SendLocalizedMessage(500237); // Target can not be seen.
       }
-      else if (m is BaseVendor || m is PlayerVendor || m is PlayerBarkeeper || m.AccessLevel > Caster.AccessLevel)
+      else if (m is BaseVendor || m is PlayerVendor || m.AccessLevel > Caster.AccessLevel)
       {
         Caster.SendLocalizedMessage(501857); // This spell won't work on that!
       }
@@ -125,7 +125,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Sixth/Mark.cs b/Scripts/Spells/Sixth/Mark.cs
index bd053ad10..0db750102 100644
--- a/Scripts/Spells/Sixth/Mark.cs
+++ b/Scripts/Spells/Sixth/Mark.cs
@@ -74,8 +74,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is RecallRune)
-          m_Owner.Target((RecallRune)o);
+        if (o is RecallRune rune)
+          m_Owner.Target(rune);
         else
           from.Send(new MessageLocalized(from.Serial, from.Body, MessageType.Regular, 0x3B2, 3, 501797, from.Name,
             "")); // I cannot mark that object.
diff --git a/Scripts/Spells/Sixth/MassCurse.cs b/Scripts/Spells/Sixth/MassCurse.cs
index 60042e493..20024e593 100644
--- a/Scripts/Spells/Sixth/MassCurse.cs
+++ b/Scripts/Spells/Sixth/MassCurse.cs
@@ -92,9 +92,7 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Sixth/ParalyzeField.cs b/Scripts/Spells/Sixth/ParalyzeField.cs
index 8bab3ba6a..b40608937 100644
--- a/Scripts/Spells/Sixth/ParalyzeField.cs
+++ b/Scripts/Spells/Sixth/ParalyzeField.cs
@@ -224,8 +224,8 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Sixth/Reveal.cs b/Scripts/Spells/Sixth/Reveal.cs
index 4b4faa593..18b05db09 100644
--- a/Scripts/Spells/Sixth/Reveal.cs
+++ b/Scripts/Spells/Sixth/Reveal.cs
@@ -107,9 +107,7 @@ namespace Server.Spells.Sixth
 
       protected override void OnTarget(Mobile from, object o)
       {
-        IPoint3D p = o as IPoint3D;
-
-        if (p != null)
+        if (o is IPoint3D p)
           m_Owner.Target(p);
       }
 
diff --git a/Scripts/Spells/Spellweaving/ArcaneCircle.cs b/Scripts/Spells/Spellweaving/ArcaneCircle.cs
index 5837f47e7..b6c9cfb11 100644
--- a/Scripts/Spells/Spellweaving/ArcaneCircle.cs
+++ b/Scripts/Spells/Spellweaving/ArcaneCircle.cs
@@ -97,7 +97,7 @@ namespace Server.Spells.Spellweaving
       {
         ItemData id = item.ItemData;
 
-        if (item == null || item.Z + id.CalcHeight != location.Z)
+        if (item.Z + id.CalcHeight != location.Z)
           continue;
         if (IsValidTile(item.ItemID))
         {
@@ -120,14 +120,12 @@ namespace Server.Spells.Spellweaving
 
     private List<Mobile> GetArcanists()
     {
-      List<Mobile> weavers = new List<Mobile>();
-
-      weavers.Add(Caster);
+      List<Mobile> weavers = new List<Mobile> { Caster };
 
       //OSI Verified: Even enemies/combatants count
       foreach (Mobile m in Caster.GetMobilesInRange(1)) //Range verified as 1
         if (m != Caster && m is PlayerMobile && Caster.CanBeBeneficial(m, false) &&
-            Math.Abs(Caster.Skills.Spellweaving.Value - m.Skills.Spellweaving.Value) <= 20 && !(m is Clone))
+            Math.Abs(Caster.Skills.Spellweaving.Value - m.Skills.Spellweaving.Value) <= 20)
           weavers.Add(m);
       // Everyone gets the Arcane Focus, power capped elsewhere
 
@@ -143,15 +141,15 @@ namespace Server.Spells.Spellweaving
 
       if (focus == null)
       {
-        ArcaneFocus f = new ArcaneFocus(duration, strengthBonus);
-        if (to.PlaceInBackpack(f))
+        focus = new ArcaneFocus(duration, strengthBonus);
+        if (to.PlaceInBackpack(focus))
         {
-          f.SendTimeRemainingMessage(to);
+          focus.SendTimeRemainingMessage(to);
           to.SendLocalizedMessage(1072740); // An arcane focus appears in your backpack.
         }
         else
         {
-          f.Delete();
+          focus.Delete();
         }
       }
       else //OSI renewal rules: the new one will override the old one, always.
diff --git a/Scripts/Spells/Spellweaving/ArcanistSpell.cs b/Scripts/Spells/Spellweaving/ArcanistSpell.cs
index ca12db952..46e133144 100644
--- a/Scripts/Spells/Spellweaving/ArcanistSpell.cs
+++ b/Scripts/Spells/Spellweaving/ArcanistSpell.cs
@@ -69,13 +69,13 @@ namespace Server.Spells.Spellweaving
         return false;
       }
 
-      if (caster is PlayerMobile)
+      if (caster is PlayerMobile mobile)
       {
-        MLQuestContext context = MLQuestSystem.GetContext((PlayerMobile)caster);
+        MLQuestContext context = MLQuestSystem.GetContext(mobile);
 
         if (context == null || !context.Spellweaving)
         {
-          caster.SendLocalizedMessage(
+          mobile.SendLocalizedMessage(
             1073220); // You must have completed the epic arcanist quest to use this ability.
           return false;
         }
@@ -93,7 +93,7 @@ namespace Server.Spells.Spellweaving
       if (caster.Skills[CastSkill].Value < RequiredSkill)
       {
         caster.SendLocalizedMessage(1063013,
-          $"{RequiredSkill.ToString("F1")}\t{"#1044114"}"); // You need at least ~1_SKILL_REQUIREMENT~ ~2_SKILL_NAME~ skill to use that ability.
+          $"{RequiredSkill:F1}\t{"#1044114"}"); // You need at least ~1_SKILL_REQUIREMENT~ ~2_SKILL_NAME~ skill to use that ability.
         return false;
       }
 
diff --git a/Scripts/Spells/Spellweaving/GiftOfLife.cs b/Scripts/Spells/Spellweaving/GiftOfLife.cs
index 04c506d1d..c16b6a7b5 100644
--- a/Scripts/Spells/Spellweaving/GiftOfLife.cs
+++ b/Scripts/Spells/Spellweaving/GiftOfLife.cs
@@ -39,8 +39,6 @@ namespace Server.Spells.Spellweaving
 
     public void Target(Mobile m)
     {
-      BaseCreature bc = m as BaseCreature;
-
       if (!Caster.CanSee(m))
       {
         Caster.SendLocalizedMessage(500237); // Target can not be seen.
@@ -49,7 +47,7 @@ namespace Server.Spells.Spellweaving
       {
         // As per Osi: Nothing happens.
       }
-      else if (m != Caster && (bc == null || !bc.IsBonded || bc.ControlMaster != Caster))
+      else if (m != Caster && !(m is BaseCreature bc && bc.IsBonded && bc.ControlMaster == Caster))
       {
         Caster.SendLocalizedMessage(1072077); // You may only cast this spell on yourself or a bonded pet.
       }
@@ -101,9 +99,8 @@ namespace Server.Spells.Spellweaving
       {
         double hitsScalar = timer.Spell.HitsScalar;
 
-        if (m is BaseCreature && m.IsDeadBondedPet)
+        if (m is BaseCreature pet && pet.IsDeadBondedPet)
         {
-          BaseCreature pet = (BaseCreature)m;
           Mobile master = pet.GetMaster();
 
           if (master?.NetState != null && Utility.InUpdateRange(pet, master))
@@ -190,8 +187,8 @@ namespace Server.Spells.Spellweaving
 
       protected override void OnTarget(Mobile m, object o)
       {
-        if (o is Mobile)
-          m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
         else
           m.SendLocalizedMessage(1072077); // You may only cast this spell on yourself or a bonded pet.
       }
diff --git a/Scripts/Spells/Spellweaving/GiftOfRenewal.cs b/Scripts/Spells/Spellweaving/GiftOfRenewal.cs
index fc2e24112..da03bc616 100644
--- a/Scripts/Spells/Spellweaving/GiftOfRenewal.cs
+++ b/Scripts/Spells/Spellweaving/GiftOfRenewal.cs
@@ -166,7 +166,8 @@ namespace Server.Spells.Spellweaving
 
       protected override void OnTarget(Mobile m, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile m)
diff --git a/Scripts/Spells/Spellweaving/ImmolatingWeapon.cs b/Scripts/Spells/Spellweaving/ImmolatingWeapon.cs
index b59770ab2..d797c9a6d 100644
--- a/Scripts/Spells/Spellweaving/ImmolatingWeapon.cs
+++ b/Scripts/Spells/Spellweaving/ImmolatingWeapon.cs
@@ -26,9 +26,7 @@ namespace Server.Spells.Spellweaving
 
     public override bool CheckCast()
     {
-      BaseWeapon weapon = Caster.Weapon as BaseWeapon;
-
-      if (weapon == null || weapon is Fists || weapon is BaseRanged)
+      if (!(Caster.Weapon is BaseWeapon weapon) || weapon is Fists || weapon is BaseRanged)
       {
         Caster.SendLocalizedMessage(1060179); // You must be wielding a weapon to use this ability!
         return false;
@@ -39,9 +37,7 @@ namespace Server.Spells.Spellweaving
 
     public override void OnCast()
     {
-      BaseWeapon weapon = Caster.Weapon as BaseWeapon;
-
-      if (weapon == null || weapon is Fists || weapon is BaseRanged)
+      if (!(Caster.Weapon is BaseWeapon weapon) || weapon is Fists || weapon is BaseRanged)
       {
         Caster.SendLocalizedMessage(1060179); // You must be wielding a weapon to use this ability!
       }
diff --git a/Scripts/Spells/Spellweaving/NatureFury.cs b/Scripts/Spells/Spellweaving/NatureFury.cs
index 4cd54376e..6a226789f 100644
--- a/Scripts/Spells/Spellweaving/NatureFury.cs
+++ b/Scripts/Spells/Spellweaving/NatureFury.cs
@@ -84,8 +84,8 @@ namespace Server.Spells.Spellweaving
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is IPoint3D)
-          m_Owner.Target((IPoint3D)o);
+        if (o is IPoint3D d)
+          m_Owner.Target(d);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Spells/Spellweaving/SummonFey.cs b/Scripts/Spells/Spellweaving/SummonFey.cs
index 4d0a660d1..d8eb77be8 100644
--- a/Scripts/Spells/Spellweaving/SummonFey.cs
+++ b/Scripts/Spells/Spellweaving/SummonFey.cs
@@ -28,13 +28,13 @@ namespace Server.Spells.Spellweaving
       Mobile caster = Caster;
 
       // This is done after casting completes
-      if (caster is PlayerMobile)
+      if (caster is PlayerMobile mobile)
       {
-        MLQuestContext context = MLQuestSystem.GetContext((PlayerMobile)caster);
+        MLQuestContext context = MLQuestSystem.GetContext(mobile);
 
         if (context == null || !context.SummonFey)
         {
-          caster.SendLocalizedMessage(
+          mobile.SendLocalizedMessage(
             1074563); // You haven't forged a friendship with the fey and are unable to summon their aid.
           return false;
         }
diff --git a/Scripts/Spells/Spellweaving/SummonFiend.cs b/Scripts/Spells/Spellweaving/SummonFiend.cs
index e3619ca9b..5b8c0df37 100644
--- a/Scripts/Spells/Spellweaving/SummonFiend.cs
+++ b/Scripts/Spells/Spellweaving/SummonFiend.cs
@@ -28,13 +28,13 @@ namespace Server.Spells.Spellweaving
       Mobile caster = Caster;
 
       // This is done after casting completes
-      if (caster is PlayerMobile)
+      if (caster is PlayerMobile mobile)
       {
-        MLQuestContext context = MLQuestSystem.GetContext((PlayerMobile)caster);
+        MLQuestContext context = MLQuestSystem.GetContext(mobile);
 
         if (context == null || !context.SummonFiend)
         {
-          caster.SendLocalizedMessage(1074564); // You haven't demonstrated mastery to summon a fiend.
+          mobile.SendLocalizedMessage(1074564); // You haven't demonstrated mastery to summon a fiend.
           return false;
         }
       }
diff --git a/Scripts/Spells/Spellweaving/WordOfDeath.cs b/Scripts/Spells/Spellweaving/WordOfDeath.cs
index fa16a9760..4b696255e 100644
--- a/Scripts/Spells/Spellweaving/WordOfDeath.cs
+++ b/Scripts/Spells/Spellweaving/WordOfDeath.cs
@@ -58,11 +58,7 @@ namespace Server.Spells.Spellweaving
           damage /= 100;
         }
 
-        int[] types = new int[4];
-        types[Utility.Random(types.Length)] = 100;
-
-        SpellHelper.Damage(this, m, damage, 0, types[0], types[1], types[2],
-          types[3]); //Chaos damage.  Random elemental damage
+        SpellHelper.Damage(this, m, damage, 0, 0, 0, 0, 0, 100);
       }
 
       FinishSequence();
@@ -79,7 +75,8 @@ namespace Server.Spells.Spellweaving
 
       protected override void OnTarget(Mobile m, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile m)
diff --git a/Scripts/Spells/Third/Bless.cs b/Scripts/Spells/Third/Bless.cs
index d0ee6aa6a..3e3f2cb82 100644
--- a/Scripts/Spells/Third/Bless.cs
+++ b/Scripts/Spells/Third/Bless.cs
@@ -77,7 +77,8 @@ namespace Server.Spells.Third
 
       protected override void OnTarget(Mobile from, object o)
       {
-        if (o is Mobile) m_Owner.Target((Mobile)o);
+        if (o is Mobile mobile)
+          m_Owner.Target(mobile);
       }
 
       protected override void OnTargetFinish(Mobile from)
diff --git a/Scripts/Targets/MoveTarget.cs b/Scripts/Targets/MoveTarget.cs
index b55765919..1057ec516 100644
--- a/Scripts/Targets/MoveTarget.cs
+++ b/Scripts/Targets/MoveTarget.cs
@@ -23,8 +23,8 @@ namespace Server.Targets
           return;
         }
 
-        if (p is Item)
-          p = ((Item)p).GetWorldTop();
+        if (p is Item pItem)
+          p = pItem.GetWorldTop();
 
         CommandLogging.WriteLine(from, "{0} {1} moving {2} to {3}", from.AccessLevel, CommandLogging.Format(from),
           CommandLogging.Format(m_Object), new Point3D(p));
diff --git a/Server/Map.cs b/Server/Map.cs
index 5ccab07f7..fe03184f8 100644
--- a/Server/Map.cs
+++ b/Server/Map.cs
@@ -95,7 +95,7 @@ namespace Server
     {
       return s.Mobiles.OfType<T>().Where(o => !o.Deleted && bounds.Contains(o));
     }
-
+    
     public static IEnumerable<T> SelectItems<T>(Sector s, Rectangle2D bounds) where T : Item
     {
       return s.Items.OfType<T>()
@@ -1081,23 +1081,13 @@ namespace Server
       return GetObjectsInRange(p, Core.GlobalMaxUpdateRange);
     }
 
-    public IPooledEnumerable<IEntity> GetObjectsInRange(Point3D p, int range)
-    {
-      return GetObjectsInRange(p, range, true, true);
-    }
-
-    public IPooledEnumerable<IEntity> GetObjectsInRange(Point3D p, int range, bool items, bool mobiles)
+    public IPooledEnumerable<IEntity> GetObjectsInRange(Point3D p, int range, bool items = true, bool mobiles = true)
     {
       return GetObjectsInBounds(new Rectangle2D(p.m_X - range, p.m_Y - range, range * 2 + 1, range * 2 + 1), items,
         mobiles);
     }
 
-    public IPooledEnumerable<IEntity> GetObjectsInBounds(Rectangle2D bounds)
-    {
-      return GetObjectsInBounds(bounds, true, true);
-    }
-
-    public IPooledEnumerable<IEntity> GetObjectsInBounds(Rectangle2D bounds, bool items, bool mobiles)
+    public IPooledEnumerable<IEntity> GetObjectsInBounds(Rectangle2D bounds, bool items = true, bool mobiles = true)
     {
       return PooledEnumeration.GetEntities(this, bounds, items, mobiles);
     }
@@ -1353,13 +1343,7 @@ namespace Server
         dest = swap;
       }
 
-      double rise, run, zslp;
-      double sq3d;
-      double x, y, z;
-      int xd, yd, zd;
-      int ix, iy, iz;
       int height;
-      bool found;
       Point3D p;
       Point3DList path = new Point3DList();
       TileFlag flags;
@@ -1370,28 +1354,25 @@ namespace Server
       if (path.Count > 0)
         path.Clear();
 
-      xd = dest.m_X - org.m_X;
-      yd = dest.m_Y - org.m_Y;
-      zd = dest.m_Z - org.m_Z;
-      zslp = Math.Sqrt(xd * xd + yd * yd);
-      if (zd != 0)
-        sq3d = Math.Sqrt(zslp * zslp + zd * zd);
-      else
-        sq3d = zslp;
+      int xd = dest.m_X - org.m_X;
+      int yd = dest.m_Y - org.m_Y;
+      int zd = dest.m_Z - org.m_Z;
+      double zslp = Math.Sqrt(xd * xd + yd * yd);
+      double sq3d = zd != 0 ? Math.Sqrt(zslp * zslp + zd * zd) : zslp;
 
-      rise = yd / sq3d;
-      run = xd / sq3d;
+      double rise = yd / sq3d;
+      double run = xd / sq3d;
       zslp = zd / sq3d;
 
-      y = org.m_Y;
-      z = org.m_Z;
-      x = org.m_X;
+      double y = org.m_Y;
+      double z = org.m_Z;
+      double x = org.m_X;
       while (Utility.NumberBetween(x, dest.m_X, org.m_X, 0.5) && Utility.NumberBetween(y, dest.m_Y, org.m_Y, 0.5) &&
              Utility.NumberBetween(z, dest.m_Z, org.m_Z, 0.5))
       {
-        ix = (int)Math.Round(x);
-        iy = (int)Math.Round(y);
-        iz = (int)Math.Round(z);
+        int ix = (int)Math.Round(x);
+        int iy = (int)Math.Round(y);
+        int iz = (int)Math.Round(z);
         if (path.Count > 0)
         {
           p = path.Last;
@@ -1517,7 +1498,7 @@ namespace Server
 
         height = id.CalcHeight;
 
-        found = false;
+        bool found = false;
 
         int count = path.Count;