Thunderjaws are one of the few breeds of Leoleo. Like all other existing breeds Thunderjaws are smaller than pure Leoleos and are the most identical in appearance. They’re named for the extra pair of horns.
Thunderjaws are bred by small Zero Beardrag and Sirian human tribes specifically for defence and herding Woolly Hadrosaurs, Amasian cattle and horses. They are aggressive in temperament and require professional handlers. Bandits often use their aggression and defensive nature as an opportunity to protect their camps allowing them to seriously injure or kill outsiders.