From f6491c0fe576e53090ad361a81a381db0c1c8144 Mon Sep 17 00:00:00 2001
From: mark1145 <mark1145@hotmail.co.uk>
Date: Sun, 22 Oct 2023 20:07:14 +0100
Subject: [PATCH] fix: Fixes mana vampire creating mana from thin air (#1561)

---
 Projects/UOContent/Spells/Seventh/ManaVampire.cs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Projects/UOContent/Spells/Seventh/ManaVampire.cs b/Projects/UOContent/Spells/Seventh/ManaVampire.cs
index 02b07b385..f98d330b7 100644
--- a/Projects/UOContent/Spells/Seventh/ManaVampire.cs
+++ b/Projects/UOContent/Spells/Seventh/ManaVampire.cs
@@ -57,8 +57,14 @@ namespace Server.Spells.Seventh
                     }
                 }
 
-                m.Mana -= Math.Clamp(toDrain, 0, Math.Min(m.Mana, Caster.ManaMax - Caster.Mana));
-                Caster.Mana += toDrain;
+                // Will not drain more than the target has currently and will not put the caster over his maximum mana
+                toDrain = Math.Clamp(toDrain, 0, Math.Min(m.Mana, Caster.ManaMax - Caster.Mana));
+
+                if (toDrain > 0)
+                {
+                    m.Mana -= toDrain;
+                    Caster.Mana += toDrain;
+                }
 
                 if (Core.AOS)
                 {