There are three different types of Guilds: Legal, Dark, and Independent. A Legal Guild is one that has been approved and registered by the Magic Council. A Dark Guild is one that has not been approved by the Magic Council and is treated as a criminal organization. An Independent Guild is one that is not approved by the Magic Council, but at the same time is not considered a criminal organization. Very little has been shown about Independent Guilds, though it appears that they can do anything they please as long as the Magic Council doesn't disapprove of the actions.