Hecate: The Enigmatic Greek Goddess of Magic

Hecate is a goddess in ancient Greek religion and mythology, most often shown holding a pair of torches, a key, or snakes, or accompanied by dogs, and in later periods depicted as three-formed or triple-bodied. She is variously associated with crossroads, night, light, magic, protection from witchcraft, drugs, the Moon, graves, and ghosts

Also Goddess of Magic