In the Dungeons and Dragons fantasy role-playing game, the Death dog is a Magical Beast. Though originating in D&D, it has became a popular creature used in several different settings, some of which have nothing to do with D&D. It resembles a large, ugly, undead hound with two heads. Each head thinks independently, but they both have a penetrating double-bark. It is similar to a Hell hound (Dungeons & Dragons), Yeth hound, Shadow mastiff and Werewolf (Dungeons & Dragons).