4 files changed, 42 insertions, 1 deletions
diff --git a/src/server/game/Entities/Player/Player.cpp b/src/server/game/Entities/Player/Player.cpp
index 9ad8eddf790..971e365a6bf 100644
--- a/src/server/game/Entities/Player/Player.cpp
+++ b/src/server/game/Entities/Player/Player.cpp
@@ -7970,7 +7970,7 @@ void Player::CastItemCombatSpell(DamageInfo const& damageInfo, Item* item, ItemT
             else if (chance > 100.0f)
                 chance = GetWeaponProcChance();
 
-            if (roll_chance_f(chance))
+            if (roll_chance_f(chance) && sScriptMgr->OnCastItemCombatSpell(this, damageInfo.GetVictim(), spellInfo, item))
                 CastSpell(damageInfo.GetVictim(), spellInfo->Id, true, item);
         }
     }
diff --git a/src/server/game/Scripting/ScriptMgr.cpp b/src/server/game/Scripting/ScriptMgr.cpp
index f04f288a828..3e19033ef1d 100644
--- a/src/server/game/Scripting/ScriptMgr.cpp
+++ b/src/server/game/Scripting/ScriptMgr.cpp
@@ -1559,6 +1559,17 @@ bool ScriptMgr::OnItemRemove(Player* player, Item* item)
     return tmpscript->OnRemove(player, item);
 }
 
+bool ScriptMgr::OnCastItemCombatSpell(Player* player, Unit* victim, SpellInfo const* spellInfo, Item* item)
+{
+    ASSERT(player);
+    ASSERT(victim);
+    ASSERT(spellInfo);
+    ASSERT(item);
+
+    GET_SCRIPT_RET(ItemScript, item->GetScriptId(), tmpscript, true);
+    return tmpscript->OnCastItemCombatSpell(player, victim, spellInfo, item);
+}
+
 bool ScriptMgr::OnDummyEffect(Unit* caster, uint32 spellId, SpellEffIndex effIndex, Creature* target)
 {
     ASSERT(caster);
diff --git a/src/server/game/Scripting/ScriptMgr.h b/src/server/game/Scripting/ScriptMgr.h
index c47c75f3a9a..10df2ecf970 100644
--- a/src/server/game/Scripting/ScriptMgr.h
+++ b/src/server/game/Scripting/ScriptMgr.h
@@ -53,6 +53,7 @@ class Player;
 class Quest;
 class ScriptMgr;
 class Spell;
+class SpellInfo;
 class SpellScript;
 class SpellCastTargets;
 class Transport;
@@ -378,6 +379,9 @@ class TC_GAME_API ItemScript : public ScriptObject
 
         // Called when the item is destroyed.
         virtual bool OnRemove(Player* /*player*/, Item* /*item*/) { return false; }
+
+        // Called before casting a combat spell from this item (chance on hit spells of item template, can be used to prevent cast if returning false)
+        virtual bool OnCastItemCombatSpell(Player* /*player*/, Unit* /*victim*/, SpellInfo const* /*spellInfo*/, Item* /*item*/) { return true; }
 };
 
 class TC_GAME_API UnitScript : public ScriptObject
@@ -955,6 +959,7 @@ class TC_GAME_API ScriptMgr
         bool OnItemUse(Player* player, Item* item, SpellCastTargets const& targets);
         bool OnItemExpire(Player* player, ItemTemplate const* proto);
         bool OnItemRemove(Player* player, Item* item);
+        bool OnCastItemCombatSpell(Player* player, Unit* victim, SpellInfo const* spellInfo, Item* item);
 
     public: /* CreatureScript */
 
diff --git a/src/server/scripts/World/item_scripts.cpp b/src/server/scripts/World/item_scripts.cpp
index 7f9a22e07a9..5ce6a8301dd 100644
--- a/src/server/scripts/World/item_scripts.cpp
+++ b/src/server/scripts/World/item_scripts.cpp
@@ -412,6 +412,30 @@ public:
     }
 };
 
+// Only used currently for
+// 19169: Nightfall
+class item_generic_limit_chance_above_60 : public ItemScript
+{
+    public:
+        item_generic_limit_chance_above_60() : ItemScript("item_generic_limit_chance_above_60") { }
+
+        bool OnCastItemCombatSpell(Player* /*player*/, Unit* victim, SpellInfo const* /*spellInfo*/, Item* /*item*/) override
+        {
+            // spell proc chance gets severely reduced on victims > 60 (formula unknown)
+            if (victim->getLevel() > 60)
+            {
+                // gives ~0.1% proc chance at lvl 70
+                float const lvlPenaltyFactor = 9.93f;
+                float const failureChance = (victim->getLevel() - 60) * lvlPenaltyFactor;
+
+                // base ppm chance was already rolled, only roll success chance
+                return !roll_chance_f(failureChance);
+            }
+
+            return true;
+        }
+};
+
 void AddSC_item_scripts()
 {
     new item_only_for_flight();
@@ -425,4 +449,5 @@ void AddSC_item_scripts()
     new item_dehta_trap_smasher();
     new item_trident_of_nazjan();
     new item_captured_frog();
+    new item_generic_limit_chance_above_60();
 }