The Slaves to Darkness are mortal warriors who have dedicated their lives to the service of the Dark Gods of Chaos—Khorne, Nurgle, Tzeentch, Slaanesh—or who follow the path of the Undivided, worshipping Chaos as a whole. They are brutal, fanatical fighters who march under the command of Archaon the Everchosen or Be'lakor, the dark master.

Their armies are made up of Chaos Warriors, Chaos Knights, Chosen, Chaos Lords, and demonic allies. They fight with unrelenting force, supported by dark magic and gifts from the Ruinous Powers. Every victory can bring a divine gift—or damnation.

Slaves to Darkness are the archetypal evil—their presence is accompanied by darkness, madness, and corruption. They are conquerors, destroyers, and fanatics who want to tear down order and reshape the Mortal Realms according to the will of Chaos. Their strength lies in their diversity—from brutal foot soldiers to demonic champions.