The jebta is a kind of Cave Runner lizard that has been trained to fight in battle by orcs

Remote orc tribes who dwelling the mountains just north of the Blasted Lands encountered and domesticated a subterranean creature they now call a jebta. Though nowhere near as fleet of foot as many other mounts found in the Land, these orcs have trained the jebta to fight, and often mount metal claws onto their front claws to make them more dangerous in battle.