Acererak

From Syra D&D Wiki

Acererak
Race	Human (Demilich)
Gender	Male
Character Class	Wizard
Patron Deity	Nerull
Status	Deceased
Alignment	Evil

Acererak is a powerful demilich and creator of the Tomb of Horrors. He was defeated by the Challengers of the Unspeakable in 2959, who took his soul gems with them to help fight the Far Realm.