Lernaean Hydra Picture

So poisonous it's footprints were deadly, and having the ability to regrow two heads for every one destroyed (although one was immortal), the Hydra was a formidable monster that lived in the swamp near Lernae. To make matters worse for any would-be monster slayers, the Hydra had an ally, a giant crab.

Despite being seemingly impossible, Hercules and his nephew Iolaos were able to slay the monsters (and safely buried the immortal Hydra head under a rock). Although unable to kill the heroes, Hera rewarded the Hydra and Crab for their efforts by placing them in the heavens as the constellations Hydra and Cancer.
Yggdrasil
Earth Shatterer
Lernaean Hydra
Battle across Ginnungagap 1
Fenrir Eating