Supernatural: 10 Most Terrifying Creatures

There are many a names for the Leviathan such as The Old One, Chomper - or Levi for short. The Liviathans are a race of ancient, primordial monsters that served as the very first beasts of the Gods, predating even Angels and The Soul. Through time these creatures proved to be too hungry and destructive, so God created Purgatory as a prison for them. They were inadvertently released when Castiel the Angel opened Purgatory and absorbed all the souls inside.

Upon their release, the Leviathans attempted to conquer North America and become the new dominant species on our planet, harvesting the human race as their primary snack source while eliminating all other competitors and fellow predators. These Children Of Eve are described as clever and poisonous, and Death finds them even entertaining. Their immense power and ravenous hunger makes Leviathans believe, that every other species is inferior to them.

In Supernatural they take the serpent-like shapes of underwater creatures, and are able to shape-shift if they can acquire DNA. Once they dislocate their jaw and reveal a mouth full of large teeth and a forked tongue, you might want to hide under your blanket.