From 7a5671ce22f790ef40409f41b169cd6788e397ba Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Thu, 9 Sep 2021 13:57:02 -0400
Subject: [PATCH] Core/Spells: autogenerate miss proc for spells with auras
 with hit chance -100

Port From (https://github.com/TrinityCore/TrinityCore/commit/50c5284602a2a80826b2de033e119bc0b6730fe9)
---
 Source/Game/Spells/SpellManager.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/Game/Spells/SpellManager.cs b/Source/Game/Spells/SpellManager.cs
index 0bb0d42e5..25ca988a9 100644
--- a/Source/Game/Spells/SpellManager.cs
+++ b/Source/Game/Spells/SpellManager.cs
@@ -1550,6 +1550,11 @@ namespace Game.Entities
                         case AuraType.ModBlockPercent:
                             procEntry.HitMask = ProcFlagsHit.Block;
                             break;
+                        // proc auras with another aura reducing hit chance (eg 63767) only proc on missed attack
+                        case AuraType.ModHitChance:
+                            if (spellEffectInfo.CalcValue() <= -100)
+                                procEntry.HitMask = ProcFlagsHit.Miss;
+                            break;
                         default:
                             continue;
                     }