Perseus
He was the son of a God (Zeus, a mighty man if you ask me)
He killed Medusa on an island far from where he lived
Medusa was a terrible thing to see, and she had two sisters that were just like her.
He got help from his family, his brother Hermes gave him a magic sword that would cut anything, and his sister Athena gave him a magic shield, so polished that it was used as a mirror. He only killed Medusa, not her sisters, and all the people that had tried before him, failed, and turned to stone (petrified) when they saw Medusa.