He is one of three named that are all together inside Lavaspinner's Lair ...
Some say they are spawned with the pulling of Stonemaw, but they did not come with him. Instead we killed them in a seperate area after Stonemaw was dead and we were looking for something else to hit.
Fairly weak, anough that even a DRU and a decent tank may be able to solo him...if his friend's decided not to join in the fray that is.