Hellhounds are demons or evil spirits that takes the form of a dog. Throughout history and in numerous cultures creatures known as hellhounds have appeared in mythology, legend and folklore - sometimes as guardians of forbidden areas or as sinister drifters that spread death and misery wherever they tread. The Hellhounds is a supernatural dog, found in folklore. A wide variety of ominous and hell supernatural dogs occur in mythologies around the world, similar to the oft-seen dragon.