Apollo taught to the humans the art of healing and archery. Phoebe, his grandmother, gave the oracular shrine of Delphi to Apollo as a birthday gift. Themis inspired him to be the oracular voice of Delphi thereon. Later, with his bow and arrows that he had received from Hephaestus, Apollo went in search of the chthonic dragon Python, which lived in Delphi beside the Castalian Spring, and was a terror to the people. Hera had sent this serpent to hunt the pregnant Leto to her death across the world. To avenge the trouble given to his mother, Apollo killed Python in
Vision Serpent meaning snake or serpent.). The Vision Serpent is thought to be the most important of the Maya serpents. "It was usually bearded and had a rounded snout. It was also often depicted as having two heads or with the spirit of a god or ancestor emerging from its jaws." During Maya bloodletting rituals, participants would experience visions in which they communicated with the ancestors or gods. These visions took the form of a giant serpent "which served as a gateway to the spirit realm." The ancestor or god who was being contacted was depicted as emerging from the serpent's mouth.