Cerberus is the guardian of the Underworld in Greek mythology. He is a giant three-headed dog belonging to Hades, who prevents souls from entering or leaving. It is possible to kill Cerberus, although he will regenerate even after decapitation. There is an unrelated monster named Cerberus who has been an enemy to Superman. Cerberus was adapted as a DC Comics character by Roy Thomas in Arak: Son of Thunder #12. (1982)

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