Rejakori

A monstrous powerhouse of a Brute Wyvern, the Rejakori (Ree-ja-ko-di) is one of the tougher monsters that can be found in the New World. Constantly at odds with the Acostega in a Predator-Prey relationship, Rejakoris have hardened and toughened to the point they barely look like herbivores.

Physiology
Quadrupedal in posture and large by size, Rejakoris have a stout form similar to ceratopsians like Styracosaurs. It's stocky body is packed with muscle, allowing it to move suddenly and fairly quickly in gallops, and it's tail is equipped with a thagomizers organized similarly to a Stegosaurs'. Their heads are equipped with folding frills, but not in the classic manner. Muscles on the side of it's head tense up, allowing a separate set of frills to be revealed. This second frill is solid like it's main head frill and is used as a display and for creating blockades and walls against would-be predators, especially useful considering Acostegas have a HUGE advantage in open terrain, even though they handle crowded territories just as well. Like many prehistoric herbivores, Rejakoris have beaks used to pluck and grasp plants than rip up entire fields of them.

Behavior
Extremely tempermental and aggressive, Rejakoris will attack anything that get's too close for too long, like a hunter or a very ignorant Kestodon. Because it's a kill or be killed world out there, Rejakoris work in massive groups to create strongholds powerful enough to act as a base should the former inhabitants be taken down.

Why they create this strong hold is due to their natural predator, the Acostega, being able to pick them off one by one if they just settled for a simple herd protection, seeing as how the monsters can easily be lead into traps like a make-shift pitfall or a vine trap.

Trivia

 * Rejakoris swapped species during development, turning from herbivores to Brute Wyvern. They are still herbivorous, though. They also swapped element, from Fire to Earth
 * Rejakoris were bassed off the Stegosaurus, the Styracosaurus, the Dozeratops from Dinotrux, the Gronckle from HTTYD, and a Hippo.