Anvuraak

Anvuraak was a death knight in opposition with the party during campaign two. He was first encountered working for Nox during the party's attack on his war encampment outside the Platinum Disc. He challenged Teer to a duel, keeping the rest of the party from interfering. Teer ultimately lost, but Anvuraak did not kill him. They would again encounter him in Nox's false lair, appearing after the death of Hedemora. He tricked Teer into attacking with Dragvandil, blocking the attack with a special shield which contained one of Nox's orbs. The sword was shattered, and Akaros captured. 
He was encountered once again in the Rotspire. In his quarters the party found a magical mirror which contained within it at least one woman and a goristro. Kiono was temporarily trapped within it, and it is assumed that Anvuraak desires to recover the woman from the mirror. Anvuraak himself was encountered on the bridge leading to Nox's ritual site, riding on the back of Anghadym's corpse. He was defeated during this encounter. The party intended to free the occupants of the mirror if possible before Anvuraak hunted them down.