Vincent Stegron was hired by S.H.I.E.L.D. to work with Dr. Curt Connors to study DNA of dinosaurs from the Savage Land. Inspired by the experiment that turned Connors into the Lizard, Stegron stole the dinosaur DNA and injected himself with it. In moments Stegron transformed into an orange semi-humanoid Stegosaurus-like creature. Stegron gained the ability to command real dinosaurs, and planned to use them in his plans for conquest.