The Rexog is a Maxis-made creature, present in the final game. They are large dinosaur-like creatures resembling an outdated reconstruction of Tyrannosaurus rex. A creature similar to Rexog, the Brontoth, appeared as an epic in trailers of Spore Galactic Adventures, battling an epic Al Packa, the Rexog and the Brontoth are very similar except for the graspers and the horns on Brontoth. This creature also appeared in the official site's announcement about the expansion until it was moved to a separate page.