Necromancy

"'The lesser necromancer evokes the spirits of the dead, commune with them. The higher necromancer can control them, command them to do their will. It is an art and like any other magic, one that can be used to help or one that can be used as a weapon.'"Widely considered by magical organizations to be one of the Foul Arts of Magic, necromancy is a branch of magic that deals with anything having to do with the dead and the undead.