Mag'ladroth

Mag'ladroth, the Ancient One, is a lost deity rediscovered by Emperor Xavan in an attempt to save his dying empire. Doomspace was created to be a vacuum of nothingness that Mag'ladroth and other entities were cast into with nothing to consume meant to be an eternal prison.
Prince Xeleth awakened a shard of Mad'ladroth during his failed ritual. This shard did not fight the group but instead announced that it would "seek out the others, to reforge what Vaul tore asunder."