Cerberus (also spelt Kerberos) is a vicious three-headed dog in Greek mythology, who guards the entrance to the underworld. He allowed the souls of the dead to enter Hades but prevented the living (except for a few exceptions) from entering. Cerberus is a son of Typhon, a Giant, and Echidna, a half-woman, half-snake creature. Anubis is the Egyptian counterpart of Cerberus. Like Cerberus, he had...