Ormer Ironbraid at the Whelgar Excavation Site wants you to kill Sarltooth and return to him with one of his talons once the task is fulfilled.
While you were down there I happened to notice that one of those beasts stood out from the rest. He was bigger and more menacing. I bet he's the one who led the others here to cause the disruption to the dig site.
I ask of you now one final task, [player]. See to it that Sarltooth is brought to justice. And considering the gravity of his crimes, justice in this case means death! Bring me one of his talons as proof of his death.