The march of the Shadow has begun. While the Ultradesant is shaken by Fae’ron’s sudden attack on Calth, Lorgar and the others bearing the Word deliver a deep blow to the realm of Ultramar. Their unreliable allies, the World Eaters, will destroy every system that stands in their way. Perhaps on the war world of Armatura, this savage brutality will finally be put an end to. Worlds will burn, legions will collide—and the Primarch will fall.