From 4879533cb1cf17e25ad63f2a00f6e7f94e0dd321 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Tue, 14 Mar 2023 04:24:59 -0400
Subject: [PATCH] Core/Auras: Implement caster selection of
 SPELL_AURA_TRIGGER_SPELL_ON_EXPIRE (stored in MiscValue)

Port From (https://github.com/TrinityCore/TrinityCore/commit/5787c0173b738302f996f11a70db634253fb18c1)
---
 Source/Game/Spells/Auras/AuraEffect.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Source/Game/Spells/Auras/AuraEffect.cs b/Source/Game/Spells/Auras/AuraEffect.cs
index bea364875..4b8a1912b 100644
--- a/Source/Game/Spells/Auras/AuraEffect.cs
+++ b/Source/Game/Spells/Auras/AuraEffect.cs
@@ -4787,7 +4787,17 @@ namespace Game.Spells
             if (!mode.HasFlag(AuraEffectHandleModes.Real) || apply || aurApp.GetRemoveMode() != AuraRemoveMode.Expire)
                 return;
 
-            aurApp.GetTarget().CastSpell(aurApp.GetTarget(), GetSpellEffectInfo().TriggerSpell, new CastSpellExtraArgs(this));
+            Unit caster = aurApp.GetTarget();
+
+            // MiscValue (Caster):
+            // 0 - Aura target
+            // 1 - Aura caster
+            // 2 - ? Aura target is always TARGET_UNIT_CASTER so we consider the same behavior as MiscValue 1
+            uint casterType = (uint)GetMiscValue();
+            if (casterType > 0)
+                caster = GetCaster();
+            
+            caster?.CastSpell(aurApp.GetTarget(), GetSpellEffectInfo().TriggerSpell, new CastSpellExtraArgs(this));
         }
 
         [AuraEffectHandler(AuraType.OpenStable)]