Abyssal Demons, also called Thurse, are entities of pure chaos and hunger. They are without well defined form, and wander the abyss aimlessly, banished from the sight of divinity, who almost universally see them as an affront from their inability to take ordered form or behavior. These beasts are nearly universally fatal to encounter. They are nearly invulnerable to harm, and take no well defined pattern of behavior, attacking with blind determination. Demons that have been tamed and given identities are known as Devils. Most of these are in service to their warden, Satan, and act as his emissaries in the physical world.
Curiously, Demons are put to use by Lókfaer engineers, using their boundless energy as the driving component of thursengines, great machines capable of driving Lókfaer contraptions and war machines.
See also: Devils