In Greek mythology, Cerberus or Kerberos (Greek Κέρβερος, Kérberos or Sürbürǔs, the daemon or ker of Erebos) was the hound of Hades, a monstrous three-headed dog with a snake for a tail and snakes down his back like a mane, whose analogs in other cultures are hellhounds. Other hell hounds included Orthus, his two-headed brother. Cerberus guarded the gate to Hades and ensured that spirits of the dead could enter,… (More on Cerberus)