ModernUO/Projects/UOContent/Spells/Necromancy/VengefulSpirit.cs

using System;
using Server.Mobiles;
using Server.Targeting;

namespace Server.Spells.Necromancy
{
    public class VengefulSpiritSpell : NecromancerSpell, ISpellTargetingMobile
    {
        private static readonly SpellInfo m_Info = new(
            "Vengeful Spirit",
            "Kal Xen Bal Beh",
            203,
            9031,
            Reagent.BatWing,
            Reagent.GraveDust,
            Reagent.PigIron
        );

        public VengefulSpiritSpell(Mobile caster, Item scroll = null) : base(caster, scroll, m_Info)
        {
        }

        public override TimeSpan CastDelayBase => TimeSpan.FromSeconds(2.0);

        public override double RequiredSkill => 80.0;
        public override int RequiredMana => 41;

        public void Target(Mobile m)
        {
            if (m == null)
            {
                return;
            }

            if (Caster == m)
            {
                Caster.SendLocalizedMessage(1061832); // You cannot exact vengeance on yourself.
            }
            else if (CheckHSequence(m))
            {
                SpellHelper.Turn(Caster, m);

                /* Summons a Revenant which haunts the target until either the target or the Revenant is dead.
                 * Revenants have the ability to track down their targets wherever they may travel.
                 * A Revenant's strength is determined by the Necromancy and Spirit Speak skills of the Caster.
                 * The effect lasts for ((Spirit Speak skill level * 80) / 120) + 10 seconds.
                 */

                var duration = TimeSpan.FromSeconds(GetDamageSkill(Caster) * 80 / 120 + 10);

                var rev = new Revenant(Caster, m, duration);

                if (BaseCreature.Summon(
                    rev,
                    false,
                    Caster,
                    m.Location,
                    0x81,
                    TimeSpan.FromSeconds(duration.TotalSeconds + 2.0)
                ))
                {
                    rev.FixedParticles(0x373A, 1, 15, 9909, EffectLayer.Waist);
                }
            }

            FinishSequence();
        }

        public override void OnCast()
        {
            Caster.Target = new SpellTargetMobile(this, TargetFlags.Harmful, Core.ML ? 10 : 12);
        }

        public override bool CheckCast()
        {
            if (!base.CheckCast())
            {
                return false;
            }

            if (Caster.Followers + 3 > Caster.FollowersMax)
            {
                Caster.SendLocalizedMessage(1049645); // You have too many followers to summon that creature.
                return false;
            }

            return true;
        }
    }
}