Typhon
Typhon was a giant of Greek mythology. He has generally been described as a monster with a hundred heads. His mouths unleashed terrible roars and dreadful torrents of flame.
According to other versions, he had the head of a donkey, his torso covered in feathers, and wings so vast that when he spread them they blotted out the light of the sun. His fingers were serpents.
Zeus struck Typhon down with his thunderbolts and buried him beneath Mount Etna, which is why, in his rage, the monster occasionally spews fire once more.