Shadow demons, also called shadow Fiends, were the product of a Demon whose essence could not properly reform in the Lower Realms planes. The physical form of a shadow demon was normally vague and undefined, often confused with the dark contours of the environment or the shadows of onlookers.
Minor shadow demons had the ability to hide themselves in these shadows and become incorporeal, often stalking prey and striking when least expected. Other demons of this type, however, could grow significantly more power based on the essence of its former self. Some of these examples included possession of a creature, flight, or the ability to drain life from a living target. Regardless of their strength, however, all shadow demons were sensitive to light and radiance, and cowered from Celestials.