Nerull

Nerull was the former god of death, darkness, murder, and the underworld. He was known as the Reaper, the Foe of All Good, the Hater of Life, and the Bringer of Darkness. His Divine Spark was stolen by The Raven Queen who now rules the dead and The Nightshade Kingdom.

Somehow, it appears that Coin's body has been used to reincarnate Nerull what that means for Eomas is unclear, but it can't be good.