Vespin Chloras

 was an archmage during the Age of Arcanum who freed the Betrayer Gods form their prisons. has not appeared on the show.

Background
Inspired by the ascension of the Raven Queen and driven by his hunger, he sought guidance and power from the betrayer gods, opening gates of their prisons and releasing them into the mortal world. Upon seeing the world, betrayer gods’ need to destroy was replaced by desire to dominate so they turned their sights to the Archmage Vespin who freed them, making him their first thrall.