Merged with the Lich King
She nearly achieved this goal when a group of banshees loyal to Sylvanas led Arthas into an ambush. During the attack Sylvanas paralyzed her nemesis with a poisoned arrow, but KelThuzad intervened and saved Entropiauniverse ped. Following the assassination attempt, Arthas journeyed to Northrend and merged with the Lich King.