Three headed Dog Guards The Underworld

Cerberus, the three headed dog was the guardian of Hades to stop and escape them who crossed the Styx, the river of death. He ensured that dread’s spirit could enter but no live could exit. He was progeny of Echidna and Typhon, Nemean Lion, Lernaean Hydra and the Chimaera were its siblings.

In Greek mythology, Heracles was a divine hero; he sent to fetch Cerberus from the underworld, through the grace of Persephone. Cerberus depicted as a creature with three heads, a serpent mane like that of Medusa, a dog-like body and a dragon’s tail. He was described with three heads, when others show it with two or just one, and some sources show with variable numbers, as many as 50. Cerberus had greed of fresh meat, so he gave the surety that the souls could enter and remained there for terror of being torn to pieces. Read more Info about 3 headed dog named Cerberus at wiki