Perseus , he was forced to kill/cut of Medusa's head of the Gorgon's sister because of greedy king Polydictes. Perseus used a shiny shield and he looked into the shield to see the reflection of Medusa without turning into stone and he succesfully came up from behind and cut-off Medusa's head. He used Hades'helmet of invinsibility and a pegasus to escape because the other Gorgons heard the slatter of the sword and he succesfully escaped