"he sent me down here to bring back the Hound of Hell"

Heracles captures Cerberus, black-figure hydria, ca.525 BC
Public DomainHeracles captures Cerberus, black-figure hydria, ca.525 BC - Credit: Bibi Saint-Pol/Wikimedia Commons
Descending to the Underworld and kidnapping the fearsome hound, Cerberus, was one of the twelve labours of Heracles, the tasks set by Eurystheus, king of Tiryns and Mycenae, whom Heracles had been ordered to serve as punishment for murdering his own wife and children.