The most powerful of the gods, and Alcmene.Hercules was very strong,He had to carry out twelve labours to become a god.One of these was to kill the Hydra.The Hydra was a monster with nine heads.It wasn't easy to kill.Each time he tried to cut off one her heads,two more appeared in the its place.With the help of his nephew lolaus,Hercules managed to cut off eight of the heads.Then,he grabbed the ninth head and buried it under a big rock.