The twelfth and last of a famous set of labours was to drag it into daylight
Heracles was allowed to take it only if he used no weapons
Myth · Greek
Greek mythology — monster, hound of Hades
The many-headed dog that guards the gates of the underworld, letting the dead in and never letting them out. Usually three-headed, with a serpent for a tail, it is the offspring of Typhon and Echidna and so a brother of the Hydra and the Chimera. Only a handful of visitors got past it: one hero by main force, one musician by playing to it, and Aeneas by way of a drugged honey-cake.
The twelfth and last of a famous set of labours was to drag it into daylight
Heracles was allowed to take it only if he used no weapons
Lulled to sleep by a Thracian musician on his way to fetch back his wife
Orpheus charmed it with the lyre, as he charmed Hades himself
Given a drugged honey-cake by a prophetess so a Trojan could pass
The Sibyl of Cumae throwing the sop, in Aeneid 6
Hesiod gives it fifty heads; everyone since has settled on three
The Theogony's brazen-voiced, raw-flesh-eating hound of Hades
Its slobber, falling on the ground, was said to sprout a deadly poison
Aconite, or wolfsbane, according to Ovid
A brother of the Hydra and the Chimera
All children of Typhon and Echidna, the parents of most Greek monsters
Dante sets it flaying the gluttons in the third circle
Inferno VI, where Virgil quiets it with a handful of earth