A large and brutish canine, the worg has been described as ‘to a wolf what an orc is to a man'; bigger, stronger, and more illtempered. Packs of worgs may be found roaming the wild places of the world, and are sometimes kept as pets and status symbols by the wealthy and powerful, ill-advised as this may be. However, they are most commonly associated with goblins, with whom they share a pack instinct, bestial cunning, and a vicious streak.

In truth, worgs of various sizes are used by many different monstrous races. Some more intelligent races have bred different strains of worg, much like different breeds of dog; hobgoblins for example, are known to raise a large breed for themselves to ride, and a smaller breed not much larger than a common wolf for their goblin kin. Goblins on the other hand, simply ride on younger worgs until they become unmanageable, at which point they are either killed or chained up.