Ioulaum

Ioulaum was a great archwizard of Netheril, a beloved champion of his people and the inventor of both the mythallar and the flying enclaves of his empire. When Ioulaum abandoned Netheril to escape the life drain dweomers of the phaerimm, panic spread at the news of his disappearance, leading to Karsus casting his spell Karsus's Avatar.