diff --git a/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp b/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
index aeb35cbf3..fcb89df18 100644
--- a/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
+++ b/src/server/scripts/EasternKingdoms/MagistersTerrace/boss_priestess_delrissa.cpp
@@ -129,6 +129,10 @@ struct boss_priestess_delrissa : public BossAI
         Talk(SAY_AGGRO);
         _JustEngagedWith();
 
+        // Prevent Splitting
+        DoZoneInCombat();
+        summons.DoZoneInCombat();
+
         ScheduleTimedEvent(15s, [&] {
             if (Unit* target = DoSelectLowestHpFriendly(40.0f, 1000))
                 DoCast(target, SPELL_FLASH_HEAL);