Every Mythical Creature From Hell Explained in Detail

Cerberus is the original security system of the underworld, and it makes every modern guard dog look embarrassing by comparison. This three-headed beast stood at the gates of Hades with one job: nothing living gets in, nothing dead gets out. Each head is described as snarling independently, and some early Greek texts actually gave him fifty or even a hundred heads before tradition settled on three. His tail was a live serpent, and his mane was said to writhe with snakes.