Cerastes...
WikiPedia:
The Cerastes in Greek myth is a serpent that is incredibly flexible, so much so that it is said to have no spine. It can have either two large ram-like horns or four pairs of smaller horns. The Cerastes hides its head in the sand with only the horns protruding out of the surface; this is meant to deceive other animals into thinking it is food. When the animal approaches the Cerastes, the Cerastes promptly kills it.
Is that cool or what?
