diff --git a/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp b/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
index 72ee8b461..aeb35cbf3 100644
--- a/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
+++ b/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
@@ -89,14 +89,16 @@ struct boss_priestess_delrissa : public BossAI
     void InitializeAI() override
     {
         ScriptedAI::InitializeAI();
-        std::list<uint32> helpersList;
-        for (uint8 i = 0; i < MAX_HELPERS_COUNT; ++i)
-            helpersList.push_back(helpersEntries[i]);
-        Acore::Containers::RandomResize(helpersList, MAX_ACTIVE_HELPERS);
 
-        uint8 j = 0;
-        for (std::list<uint32>::const_iterator itr = helpersList.begin(); itr != helpersList.end(); ++itr, ++j)
-            me->SummonCreature(*itr, helpersLocations[j], TEMPSUMMON_MANUAL_DESPAWN, 0);
+        if (instance->GetBossState(DATA_DELRISSA) != DONE)
+        {
+            std::vector<uint32> helpersList(std::begin(helpersEntries), std::end(helpersEntries));
+            Acore::Containers::RandomResize(helpersList, MAX_ACTIVE_HELPERS);
+
+            uint8 j = 0;
+            for (uint32 entry : helpersList)
+                me->SummonCreature(entry, helpersLocations[j++], TEMPSUMMON_MANUAL_DESPAWN, 0);
+        }
     }
 
     void JustSummoned(Creature* summon) override
diff --git a/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp b/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
index 6b6d656fa..e59ef59c7 100644
--- a/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
+++ b/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
@@ -52,6 +52,11 @@ DoorData const doorData[] =
     { 0,                       0,                    DOOR_TYPE_ROOM    } // END
 };
 
+BossBoundaryData const boundaries =
+{
+    { DATA_KAELTHAS, new RectangleBoundary(118.64f, 178.63f, 125.69f, 210.70f) }
+};
+
 Position const KalecgosSpawnPos = { 164.3747f, -397.1197f, 2.151798f, 1.66219f };
 
 class instance_magisters_terrace : public InstanceMapScript
@@ -65,6 +70,7 @@ public:
         {
             SetHeaders(DataHeader);
             SetBossNumber(MAX_ENCOUNTER);
+            LoadBossBoundaries(boundaries);
             SetPersistentDataCount(MAX_PERSISTENT_DATA);
             LoadObjectData(creatureData, gameobjectData);
             LoadDoorData(doorData);