Deathly Usher

The Deathly Usher is a wraith that appears at the base of the Rise of the Defiler in Blasted Lands during You Are Rakh'likh, Demon. It offers teleportation to the top of the rise.

Despite being a ghost, it is marked as humanoid.

Quotes
I am bound eternally to this cursed world. What is it you desire, mortal?
 * Gossip