Amongst the elite brotherhood of Space Marines, there exists a Chapter destined to stand apart from their battle-brothers, for it is their sworn duty to fight Chaos in its most terrible form. The Grey Knights act as the military arm of the Ordo Malleus, the Daemonhunters who form the oldest branch of the Inquisition.
Founded on an order from the Emperor himself, each Grey Knight is a potent psyker, pure of heart and just of cause. This is essential, for in their battles they confront the most horrible of Daemons wherever the Warp fiends appear. Privy to the darkest secrets of Mankind and armed with deadly Nemesis Force weapons and the most advanced gear in the Imperium, the Grey Knights are the ultimate counter to the Warp-spawned minions of the Ruinous Powers.