Snake

There is also another version of the Baphomet Sigil created by John D. Allee which depicts a serpent devouring its tail around the pentagram. This is symbolic of the Ouroboros, which originates with the Ophites. The Ouroboros myth is that of the serpent devouring its tail while its body expands representing simultaneous creation/destruction - many Satanists identify with Satan as a force which both creates and destroys simultaneously and hence some, especially theistic, Satanists identify with the concept. http://noctuliusworks.satanicwebsites.com/custom.html

Reptilian eye: