Hercules is the son of Zeus and Alcmene, a mortal.  When he was still a baby, Zeus's queen Hera sent 2 snakes to kill the poor infant but it failed.  He grew to be a champion wrestler and possesses phenomenal strengths.  During that time he was driven mad by Hera.  In a fury, he took the life of his children.  To atone for what he did, he was sentenced to accomplish "The Twelve Labors" for the king of Tiryns and Mycenae.   The second labor was to slay Hydra, the dragon of Lerna.  This dragon is said to have 8 or 9 heads.  Every time Hercules would slash off a head it grows back.  Iolaus helped Hercules by putting burning torch to every head cut off and this kept the heads from growing again.  Hercules slit the last head and finally slaying the Hydra.

Haymo was a giant of noble birth from Austria.  The townsfolk of Innsbruck consider him their defender and greatly respected him.  At some point a dragon occupied a mountain near the town.  It was said that the dragon hoarded some treasures and during strong rains the treasures were swept down the mountain. The local folks were happy to discover scattered gold on the ground but this made the dragon really mad and killed every living thing. Haymo fought with the dragon until he slew it in its nest where it retreated, he then slashed off its tongue as a proof.