Amphisbaena are tentacle-covered demons.
Amphisbaena demons have the wings and body of a giant chicken. They are covered in tentacles, with one very large tentacle containing an eye and a mouth with snapping fangs. Magnus Bane believes that amphisbaena demons are one of the most disgusting demons he has ever summoned.
In mundane stories, amphisbaena demons have the head and tail of a snake.