An orc is one of a race of mythical human-like creatures, generally described as fierce and combative, with grotesque features and often black, grey or greenish skin. This mythology has its origins in the writings of J. R. R. Tolkien. Orcs are generally seen as repulsive and are sometimes thought to not be able to handle direct sunlight just as many other monsters were in history as to show that people could not be harmed by them in sunlight. An aversion to sunlight is also used to signify something as evil by representing it as an enemy of light, and all that is good/holy/acceptable/pure/true. These creatures have since become popular figures in other fantasy and science fiction literature as well as many types of fantasy games. They are variously portrayed as physically stronger or weaker than humans, but always high in numbers. They often ride boars, wolves and wargs.