Hexadragon

A dinosaur with hard, black skin which has lived since ancient times. They are particularly ferocious, even among other meat-eating dinosaurs. They adapt well to their environment, and are found in locations with the worst conditions possible, such as in miasma filled forests, poison gas spewing valleys, and more. Though it's hard to tell with its dark skin, the hexadragon has a pair of crimson eyes and another set of eyes with 4 black pupils, so it holds a surprisingly wide range of vision. They will never lose sight of their prey, and will spew massive flames to take down its target.