diff --git a/src/game/CreatureEventAI.cpp b/src/game/CreatureEventAI.cpp
index 27969b9b2..8849b52d8 100644
--- a/src/game/CreatureEventAI.cpp
+++ b/src/game/CreatureEventAI.cpp
@@ -711,7 +711,7 @@ void CreatureEventAI::ProcessAction(CreatureEventAI_Action const& action, uint32
             break;
         case ACTION_T_SET_INST_DATA:
         {
-            InstanceData* pInst = (InstanceData*)m_creature->GetInstanceData();
+            InstanceData* pInst = m_creature->GetInstanceData();
             if (!pInst)
             {
                 sLog.outErrorDb("CreatureEventAI: Event %d attempt to set instance data without instance script. Creature %d", EventId, m_creature->GetEntry());
@@ -730,7 +730,7 @@ void CreatureEventAI::ProcessAction(CreatureEventAI_Action const& action, uint32
                 return;
             }
 
-            InstanceData* pInst = (InstanceData*)m_creature->GetInstanceData();
+            InstanceData* pInst = m_creature->GetInstanceData();
             if (!pInst)
             {
                 sLog.outErrorDb("CreatureEventAI: Event %d attempt to set instance data64 without instance script. Creature %d", EventId, m_creature->GetEntry());
diff --git a/src/game/InstanceData.cpp b/src/game/InstanceData.cpp
index 9b55a3c4a..d1d05a882 100644
--- a/src/game/InstanceData.cpp
+++ b/src/game/InstanceData.cpp
@@ -34,4 +34,11 @@ bool InstanceData::CheckAchievementCriteriaMeet( uint32 criteria_id, Player cons
     sLog.outError("Achievement system call InstanceData::CheckAchievementCriteriaMeet but instance script for map %u not have implementation for achievement criteria %u",
         instance->GetId(),criteria_id);
     return false;
-}
\ No newline at end of file
+}
+
+bool InstanceData::CheckConditionCriteriaMeet(Player const* /*source*/, uint32 map_id, uint32 instance_condition_id)
+{
+    sLog.outError("Condition system call InstanceData::CheckConditionCriteriaMeet but instance script for map %u not have implementation for player condition criteria with internal id %u for map %u",
+        instance->GetId(), instance_condition_id, map_id);
+    return false;
+}
diff --git a/src/game/InstanceData.h b/src/game/InstanceData.h
index cf1e1f2a9..524d792f8 100644
--- a/src/game/InstanceData.h
+++ b/src/game/InstanceData.h
@@ -73,6 +73,10 @@ class MANGOS_DLL_SPEC InstanceData
 
         // Achievement criteria additional requirements check
         // NOTE: not use this if same can be checked existed requirement types from AchievementCriteriaRequirementType
-        virtual bool CheckAchievementCriteriaMeet(uint32 /*criteria_id*/, Player const* /*source*/, Unit const* /*target*/ = NULL, uint32 /*miscvalue1*/ = 0);
+        virtual bool CheckAchievementCriteriaMeet(uint32 criteria_id, Player const* source, Unit const* target = NULL, uint32 miscvalue1 = 0);
+
+        // Condition criteria additional requirements check
+        // This is used for such things are heroic loot
+        virtual bool CheckConditionCriteriaMeet(Player const* source, uint32 map_id, uint32 instance_condition_id);
 };
 #endif
diff --git a/src/game/Object.cpp b/src/game/Object.cpp
index c6e221a76..333f1c97a 100644
--- a/src/game/Object.cpp
+++ b/src/game/Object.cpp
@@ -1136,7 +1136,7 @@ void WorldObject::GetZoneAndAreaId(uint32& zoneid, uint32& areaid) const
     GetBaseMap()->GetZoneAndAreaId(zoneid, areaid, m_positionX, m_positionY, m_positionZ);
 }
 
-InstanceData* WorldObject::GetInstanceData()
+InstanceData* WorldObject::GetInstanceData() const
 {
     Map *map = GetMap();
     return map->IsDungeon() ? ((InstanceMap*)map)->GetInstanceData() : NULL;
diff --git a/src/game/Object.h b/src/game/Object.h
index b1036f989..32beee20e 100644
--- a/src/game/Object.h
+++ b/src/game/Object.h
@@ -380,7 +380,7 @@ class MANGOS_DLL_SPEC WorldObject : public Object
         uint32 GetAreaId() const;
         void GetZoneAndAreaId(uint32& zoneid, uint32& areaid) const;
 
-        InstanceData* GetInstanceData();
+        InstanceData* GetInstanceData() const;
 
         const char* GetName() const { return m_name.c_str(); }
         void SetName(const std::string& newname) { m_name=newname; }
diff --git a/src/game/ObjectMgr.cpp b/src/game/ObjectMgr.cpp
index 50394dec4..fd0895a81 100644
--- a/src/game/ObjectMgr.cpp
+++ b/src/game/ObjectMgr.cpp
@@ -45,6 +45,7 @@
 #include "WaypointManager.h"
 #include "GossipDef.h"
 #include "Mail.h"
+#include "InstanceData.h"
 
 #include <limits>
 
@@ -7417,6 +7418,15 @@ bool PlayerCondition::Meets(Player const * player) const
             }
             return false;
         }
+        case CONDITION_INSTANCE_SCRIPT:
+        {
+            // have meaning only for specific map instance script so ignore other maps
+            if (player->GetMapId() != value1)
+                return false;
+            if (InstanceData* data = player->GetInstanceData())
+                return data->CheckConditionCriteriaMeet(player, value1, value2);
+            return false;
+        }
         default:
             return false;
     }
@@ -7630,6 +7640,17 @@ bool PlayerCondition::IsValid(ConditionType condition, uint32 value1, uint32 val
 
             break;
         }
+        case CONDITION_INSTANCE_SCRIPT:
+        {
+            MapEntry const* mapEntry = sMapStore.LookupEntry(value1);
+            if (!mapEntry || !mapEntry->IsDungeon())
+            {
+                sLog.outErrorDb("Instance script condition has not existed map id %u as first arg, skipped", value1);
+                return false;
+            }
+
+            break;
+        }
         case CONDITION_NONE:
             break;
     }
diff --git a/src/game/ObjectMgr.h b/src/game/ObjectMgr.h
index a989f2627..25697dbec 100644
--- a/src/game/ObjectMgr.h
+++ b/src/game/ObjectMgr.h
@@ -315,9 +315,10 @@ enum ConditionType
     CONDITION_LEVEL                 = 15,                   // player_level 0, 1 or 2 (0: equal to, 1: equal or higher than, 2: equal or less than)
     CONDITION_NOITEM                = 16,                   // item_id      count
     CONDITION_SPELL                 = 17,                   // spell_id     0, 1 (0: has spell, 1: hasn't spell)
+    CONDITION_INSTANCE_SCRIPT       = 18,                   // map_id       instance_condition_id (instance script specific enum)
 };
 
-#define MAX_CONDITION                 18                    // maximum value in ConditionType enum
+#define MAX_CONDITION                 19                    // maximum value in ConditionType enum
 
 struct PlayerCondition
 {
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index cf3241dfe..1405e9d7e 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "9794"
+ #define REVISION_NR "9795"
 #endif // __REVISION_NR_H__