The most mysterious of the Emperor's servants, the Grey Knights are a unique Chapter of Space Marines. Each is an elite warrior-mystic, clad in sigil-scribed power armour and wielding archaic weapons through which they channel their otherworldly abilities. They are a purified order of incorruptible daemonhunters, possessed of the iron fortitude needed to face the warp's most nightmarish denizens. Guided by powerful Librarians, the elite Strike Squads of the Grey Knights teleport onto the battlefield, supported by mighty psychic warriors clad in Terminator armour and towering, heavily-armed Nemesis Dreadknights.