Ioulaum was a great archwizard of the [[Netherese Empire]], a beloved champion of his people and the inventor of both the mythallar and the flying enclaves of his empire. When Ioulaum abandoned Netheril in −339 DR, panic spread at the news of his disappearance, which was one of the events which led to [[The Wizard Karsus]] casting his spell [[Karsus's Avatar]]. #NPC/Karsus/OP/Canon