Ankylosaurus is an extinct genus of ankylosaur dinosaur that lived in North America during the Late Cretaceous period. It was built like a living tank, with extremely thick, bony plates of armor on its body, even including armored eyelids. Its tail also had a second function; it could act as a deadly club. The club was used to swing around and smash into an attacking dinosaur. Its club was so daunting that not even a Tyrannosaurus rex would want to mess with this alarming species. Instinct: Eat the local flora

• defend the herd