Seroch

Seroch is a powerful being that has been locked in the Desolate World. He is known to be the same race as Eshreal and his brother Keroch (known currently as oracles).

According to the testimony of Eshreal, Seroch is an evil being who seeks dominion (and if not dominion, destruction) of the Wayspace and all universes contained within. Long ago, however, he was defeated and bound to the Desolate World, trapped and unable to leave. Somehow, he managed to capture and imprison his brother, Keroch, and is holding him captive.

Affiliation with the Aeon Priesthood
Seroch is the primary deity of the Aeon Priesthood. The Priesthood believes Seroch, in a deal with a greater evil, sacrificially gave himself up to be held captive and tormented in the Desolate World. The Priesthood believes that the Desolate World is tied to their world, and if their world is destroyed, then Seroch would be destroyed. They are very aggressive during incursions, seeking to destroy parallel worlds rather than divert them.