Xith

Xith, once known as Xera, The Ever Living Mother, is the mother of monsters, the goddess of undeath, disease and perversion.

Following her transformation, little is known of her. She is believed to be the origin of the lycanthropy curse, and also the vampirism curse. Several monstrous creatures claim her as their patron goddess, and even her mother. The more reasonable claim that hers is a domain of transmogriphication, of becoming, rather than of perversion. But since the results appear so grotesque, theirs is a hard position to justify.