Trollocs are nasty, brutish creatures created by Dreadlords as foot-soldiers. They are large-bodied, with the heads of animals, as well as sometimes other parts, such as hooves. They come from human stock, however, and sometimes they spawn Myrddraal.
They can see in the dark better than humans, but dislike bright light. Some can track by scent or sound, but they are lazy. They kill for the joy of killing. They speak their own language, but they can also speak human tongues, with some difficulty.