Hecate - Greek crone goddess, gatekeeper of the underworld, the guardian of the crossroads. Known also as the goddess of witchcraft. She lends power to spells for diviniation, intuition, banishing, protection, and transformation. Invoke her justice against those who have harmed a witch.
A word to the wise: they are not your servants, whores, or playthings. You do not "Keep" them. Treat them with respect, and you shall be rewarded. Fail to do so, and they shall respond accordingly.