Helioptar

The helioptar is a large, hunched-over bipedal reptile native to the Caluan Desert. It stands about 12 feet tall and has a wingspan almost as large. It has long arms with sharp claws, and small appendages on its rib cage that it uses to grasp small prey and rip it apart.
  When it walks slowly, its large knuckles drag along the sand. The helioptar is a fearsome predator that is well adapted to its desert habitat.