Perseus may hack Medusa's head off with a sword, but in most cases his success comes from quick, clever thinking rather than through mad fighting skills. Just think about it: he blackmails the Graeae by threatening not to return their eye and tooth; he defeats the sleeping Medusa by looking at her only through a reflection; and he hides from the other two Gorgons with the helmet of invisibility. Perseus isn't the only clever guy in the story, though. King Polydectes is pretty cunning himself, setting Perseus up to go on Mission Impossible. His trickery is repaid in kind when Perseus surprises Polydectes and turns him into stone using his handy-dandy Gorgon head.