Balor

Balor was worshipped as a chaos god by the Cynrog. While escaping from a war, Balor crashed in Yns Du in the 1930s and his consciousness became embedded in Nathaniel Morton, Bronwyn Ceredig, and five others. Using children's bad dreams and worries, Balor was resurrected. He was killed shortly afterwards. (NSA: The Nightmare of Black Island)