Bane of the Northern Waste, Throkmaw the Black was the mightiest winged Dragon, save Smaug, in all the Grey Mountains. Like Smaug, he was a descendant of Ancalagon and had inherited much of his archfather's strength. Fortunately for the Free Peoples of Rhovanion, though, Throkmaw never ventured south of the peaks. Instead, he confined himself to rare flights into the northern wastes, where he hunted Trolls and Lossoth. His lair was situated beneath the Shab Arch, in the northern foothills of the range, about 20 miles northeast of Scatha's home in Gondmaeglom.