Mesathorn resembles a dragon with a long neck and long thorns all over its body. Its front legs are larger than its hind legs, and it also has a long neck. It has a set of two large thorns on its back, as well two thorns on its shoulders and hind legs, and two thorns on the backs of each of its rear feet. On its front feet, it has a pair of massive spikes for each of its toes, with a spike on the back of the foot. On its head are a pair of horns on the back of its head, and on the sides of the back of the head are two horns curving out in front of the mouth. Mesathorn also has a pair of tusks coming out of the bottom of its mouth.