Proto-Indo-European mythology also in the myths of the slaying of the nine-headed Lernaean Hydra by Heracles and the slaying of Python by Apollo. The story of Heracles's theft of the cattle of Geryon is probably also related. Although Heracles is not usually thought of as a storm deity in the conventional sense, he bears many attributes held by other Indo-European storm deities, including physical strength and a knack for violence and gluttony. The original Proto-Indo-European myth is also reflected in Germanic mythology. In Norse mythology, Thor, the god of thunder, slays the giant serpent Jörmungandr, which lived in the waters surrounding the
Cycnus (son of Ares) the hand of Heracles. Cycnus (son of Ares) In Greek mythology, Cycnus (Ancient Greek: Κύκνος means "swan") or Cygnus, was a bloodthirsty and cruel man who dwelt either in Pagasae, Thessaly or by the river Echedorus in Macedonia. Cycnus was the son of Ares by Pelopia or Pyrene. He married Themistonoe, daughter of King Ceyx of Trachis and possibly, Alcyone, daughter of Aeolus. Cycnus killed all of his guests until he was slain by Heracles. According to Pausanias, one of the men murdered by him was Lycus of Thrace. Pseudo-Apollodorus wrote of Cycnus the Thessalian, the son of Pelopia, and