Haz is a mage who works for the Shadow Thieves in Athkatla.

If the player sided with Bodhi in Chapter 3, you will need to kill Haz to gain the key to Aran Linvail's chamber. If you sided with Aran Linvail, Haz will be waiting for you in the Lower Tombs of the Athkatla Graveyard with a golem, willing to help you defeat Bodhi.