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.
Serpent (symbolism) "The Way of the Fire Dragon"), where "Nin Giz Zida" is believed to be a fire serpent of Tibetan rather than Sumerian origin. "Nin Giz Zida" is another name for the ancient Hindu concept Kundalini, a Sanskrit word meaning either "coiled up" or "coiling like a snake". "Kundalini" refers to the mothering intelligence behind yogic awakening and spiritual maturation leading to altered states of consciousness. There are a number of other translations of the term, usually emphasizing a more serpentine nature to the word—e.g. "serpent power". It has been suggested by Joseph Campbell that the symbol of snakes coiled around