Empusa

Empusa could assume the form of a beautiful young woman, a cow, a dog, or a donkey. She had one leg of bronze and one leg of a donkey, though she hid this when luring victims. She attacked travellers on lonely roads, draining their blood or devouring their flesh while they slept. Aristophanes featured her in The Frogs, where Dionysus encounters her on his descent to the underworld and is terrified. The philosopher Apollonius of Tyana reportedly exposed and banished an empusa who had seduced one of his students. Later tradition conflated empusae with lamiae and other female vampiric spirits.