Get have everything you need to start a new army of devastating Chaos Knights, or add one to your existing forces. The book explores the new lore and background, including all the rules you need to field Chaos Knights in your games of Warhammer 40,000. A set of Datacards will give you rules at a glance on the battlefield. And, of course, you'll want one of the new Chaos Knights to build either a Knight Desecrator or Knight Rampager.