Limited edition novella: Among the hallowed ranks of the Adeptus Astartes, few have attained such renown as Ortan Cassius – Ultramarines Chaplain and Master of Sanctity. Hero of the first Tyrannic War, his name is legend. When the hive fleets target the world of Styxia, Cassius leads the defence, marshalling the Ultramarines against the xenos monstrosities.