Demon
Demons are a specific type of intelligent magical entity that develops in magic-rich environments, somewhat akin to a mold or fungus in a humid atmosphere. Sympathetic to mortals, demons are formed by thoughts and actions.
Demons do not have souls of their own, though their bodies contain certain elemental powers. They tend to accumulate in locations that do not have a strong ideological harmony, particularly empty dimensions and demesnes. They have been known to spring up near powerful sources of magic to siphon off power from it. Demons do not mate or otherwise reproduce.
Various sub-categories and classifications of demons exist, depending on affiliation with an emotional spectrum, ideological preference, preference for anarchy or law, and the source of the magical energy that sustains them. Malevolent demons (such as in Hell) are sometimes called 'devils' while flighty and deceitful demons are called 'fae'.