Carcharoth is a werewolf raised personally by Melkor to guard Angband against Huan. When Beren and Lúthien leave Angband with the Silmaril, Carcharoth bites off Beren’s hand, swallowing the Silmaril, which burns him and drives him mad with pain. He runs away, killing everything in his path, and eventually reaches Doriath, where he’s killed by Beren and Huan, though he mortally wounds both.