Hey, I don't know if you still need help or if DVB is helping you, but Hekate (or Hecate or whatever, variable spellings depending on translation and all that) is a goddess of magic, so you could have powers as simple as spell-slinging that grow progressively stronger as the RPG goes on. You could also consider shapeshifting, as Hekate is an archetypal threefold goddess associated with the changing faces of the moon, and her followers in the myths (Cersei springs readily to mind) turned men into animals. Pigs were popular. So animal dimorphism perhaps?