Native to the Primal and Naturae Islands, the Hornrexia flies so it can reach the tops of the trees where the best fruits and leaves are. It's cranium is stronger than any normal bone structure, this creature is made to resemble Dracorex Hogwartsia. This creature has a peculiar roar that makes any potential threat to think it is a dangerous predator, which however does attract various dinosaur like predators within the area causing a massive and brutal chaotic bloodbath like scene.