Forged according to the Jailer's will, the Helm of Domination was to be the vessel of Death's influence on Azeroth. The nathrezim imprisoned the spirit of the orc chieftain Ner'zhul within the helm, granting him command over a vast army of undead Scourge. The fallen Prince Arthas Menethil freed the Helm from the Frozen Throne, donning it to take up the mantle of the Lich King.