Ythazz was one of the members of the original group of Red Wizard when Thay was still a province of the empire of Mulhorand. He in 922 DR guided his fellow in revolt. They sack and destroy Delhumide, the provincial capital. At the Battle of Thazalhar, a conjurer named Jorgmacdon summons the demon lord Eltab to the Red Wizards' aid, and the Mulhorandi army is routed. So driven out the Mulhorandi Ythazz and the others pose the basis for modern Thay, they established the zulkir, one from each magic school, as supreme authorities of the land. Among that original group Ythazz was considered the leader and many called him the First Zulkirs In time however Ythazz grew bored of political business, preferred use his time in magic research. So he transformed himself in lich and settled in deep catacombs under Bezantur. In time he evolved to demilich status, totally concerned in his research but not completely forgot the land he had contribute to create, in truth he schemed to return and unlashed terrible vengeance upon those Thayans who did not honor his memory. In 1368 he seek a mortal body to inhabit, and he send his various minions, vampires, wights, ghosts, and lesser forms of undead, to search a suitable victim. So far all candidates were not adapt dying before Ythazz can inhabit their mortal bodies. 
- ↑ 1.0 1.1 1.2 Anthony Pryor (1995). Spellbound (Campaign Guide). (TSR, Inc), pp. 4,37. ISBN 978-0786901395.
- ↑ 2.0 2.1 2.2 Brian R. James and Ed Greenwood (September, 2007). The Grand History of the Realms. (Wizards of the Coast), p. 111. ISBN 978-0-7869-4731-7.
- ↑ Richard Baker, Matt Forbeck, Sean K. Reynolds (May 2003). Unapproachable East. (Wizards of the Coast), p. 163. ISBN 0-7869-2881-6.
- ↑ Ed Greenwood, Sean K. Reynolds, Skip Williams, Rob Heinsoo (June 2001). Forgotten Realms Campaign Setting 3rd edition. (Wizards of the Coast), p. 270. ISBN 0-7869-1836-5.