Caduceus is a continuation of the older Indo-European dragon-slayer motif. Wilhelm Heinrich Roscher (1913) pointed out that the serpent as an attribute of both Hermes and Asclepius is a variant of the "pre-historic semi-chthonic serpent hero known at Delphi as Python", who in classical mythology is slain by Apollo. One Greek myth of origin of the caduceus is part of the story of Tiresias, who found two snakes copulating and killed the female with his staff. Tiresias was immediately turned into a woman, and so remained until he was able to repeat the act with the male snake seven years later.
Midgard Serpent (Marvel Comics) a splash page to depict the creature's size, and then full pages to demonstrate the battle between the pair. Although killed, the Serpent was resurrected in "Thor" #486 - 488 (May - July 1995), and featured in "Avengers" vol. 3, #1 (Feb. 1998) before reappearing in "Thor" #80 vol. 2, (Aug. 2004). The Midgard Serpent first appears when a scientist draws what he believes to be venom from a statue of the serpent, the liquid becoming a deadly solvent. In the realm of Asgard, the seer Volla makes a prophecy that Thunder God Thor will battle the Midgard Serpent during