Hydra

The Hydra is one of the most iconic Greek myths.It is usually depicted as a lizard with either seven or nine heads, each able to spit acid or fire. It shows up in one of Heracles's tasks. Heracles had to kill the hydra in order for him to show his worth and take his place in Olympus. This was not an easy task, as once you chopped off one head, two more heads grew back in its place. To thwart the Hydra, Heracles's nephew set fire to each head after Heracles had decapitated so that the head could not return.