Dark Magic is the most dangerous kind of sorcery and some would say the most potent of all. Certainly it is the great adversary of High Magic, and just as High Magic is pure and noble so Dark Magic is corrupt and debased. Its energies come from the raw and dangerous power that blows from the Realm of Chaos itself.
The Dark Elves are the greatest practitioners of Dark Magic, and their sorcerers are fierce rivals of the High Mages of the High Elves. Dark Elves use only Dark Magic. Some other sorcerers can also use Dark Magic, including Chaos sorcerers and Beastmen Shamans from the Chaos army, and Liches, Vampires and Necromancers from the Undead army.