Iskalder

Iskalder is a mjordin vrykul hero, initially slumbering in the Halls of the Ancestors in Icecrown and is rumoured to be the greatest vyrkul hero ever.

The Bone Witch directs you to wake him and use an amulet to subjugate his will and return him to her. She then has you use Iskalder (possessed) to draw Vardmadra to a battle, in order to possess her.