Valthian

Valthian was a powerful wizard and a member of the Cult of the Spider.

Along with Theriana, he sought the keys to her prison and encountered the Brightstone Heroes several times during his search. He later led an army of undead and other cultists in an assault on the swordmage school of Tarth Moordra, leaving none alive. The heroes caught up with him there, and after a fierce battle he was killed.