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.
Horned Serpent is found as early as the fourth century BC in Northern Italy, where a huge antlered figure with torcs and a serpent was carved on the rocks in Val Camonica. A bronze image at Étang-sur-Arroux and a stone sculpture at Sommerécourt depict Cernunnos' body encircled by two horned snakes that feed from bowls of fruit and corn-mash in the god's lap. Also at Sommerécourt is a sculpture of a goddess holding a cornucopia and a pomegranate, with a horned serpent eating from a bowl of food. At Yzeures-sur-Creuse a carved youth has a ram-horned snake twined around his legs, with