Known even before the Horus Heresy, as a zealous legion, their faith in the Emperor became a most unshakable and righteous belief in the Chaos Gods when they turned against the Imperium. Now they devote their lives to praise and dedication to their unholy masters, and the destruction of that which they once supported. They always have hordes of fanatical followers of the Chaos Gods, which in turn attracts many daemons to the battlefields they fight on.