Scepter of Sargeras

Roy's powerful frost demon blood seeped into the various gaps of the Armor of Domination and came into contact with Ner'zhul's soul. Thus, the transformation began. This transformation would bring immense pain to the soul, and the roars of Ner'zhul's agonized soul were endless during this time.

What was a lich? In fact, a lich was a kind of soul energy life form. After transforming, the soul of a lich would undergo tremendous changes. The souls of ordinary life forms could only drive a body with freshy life energy, but the soul of a lich was different. It could only drive corpses and dead bones. This was why liches often appeared in the form of the dead in the eyes of the world.

Kil'jaeden turned a deaf ear to Ner'zhul's wails. He grinned sinisterly as he took out an enormous piece of ice and sealed the Armor of Domination and Frostmourne inside.