Nagehyren

Nagehyren is a mysterious dark power, thought to be a lich, who lives in a tomb sunken below the Engenvass Swamp. 
Much about Nagehyren remains unknown but not long ago he had dealings with Lothar Von HughGraven, transforming the former Baron of Trinsk into a vampire in exchange for a powerful amulet known as the Star of Trinsk. 
Nagehyren is thought to be the disciple of the lich Acererak, who built the legendary Tomb of Horrors.