Orthrus was a two headed hound, the monstrous son of Typhon and Echidnae. He served as a watchdog over the cattle herds of Geryon, a his three headed and three bodied uncle. As part of his twelve labours Herakles was forced to kill Orthrus in order to steal the cattle.

Orthrus's Siblings: Chimera, Cerberus, The Sphinx, Hydra, the Eagle of Prometheus, and the Nemean Lion.

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