Hellhound A demonic dog of hell, usually referring to Cerberus, the dog of Hades from Greek Mythology. The ghostly hounds are said to haunt parts of the United Kingdom and many names are given to the apparitions: Black Shuck of East Anglia, Moddey Dhoo of the Isle of Man, Gwyllgi of Wales. Hellhounds are a common creature in fantasy fiction, such as in Arthur Conan Doyle’s “The Hound of the Baskervilles” and Frank Belknap Long’s “The Hounds of Tinadalos”. They are also a common enemy in role-playing and video games, including “Dungeons & Dragons”, “Shadowrun”, “RuneScape”, “Adventure Quest” and the “Zork” series. Hellhounds are aggressive, violent dogs that can and do serve demons in Supernatural. They commonly appear to kill a person who has made a deal with a crossroads demon allowing the person’s soul to be harvested by Hell. In the days proceeding the end of a person’s time, they will appear to the victim in dreams. The person will also hallucinate, and be able to see the true face of demons when they are possessing humans. Their origin is unknown. They are also used to hunt down renegade demons and drag them back to Hell.