On the Imperial Hive World of Ikara IX, Chaplain Kastor and Apothecary Polixis, brothers in blood as well as in battle, stand firm against the endless Greenskin horde. But a threat is looming. An invasion like no other assaults the broken city of Shebat, as the crazed warlord Urgork arrives to lay waste to the Imperial forces and capture a Primaris Marines for his own twisted ends. As Kastor and Polixis find themselves separated by the disaster that unfolds, the brothers must turn the tide of war to win the battles that rage within their very natures, as well as those upon the battlefield.

    His name is whispered and cursed across both time and space, a peerless blademaster who even death cannot threaten. He is Lucius the Eternal, blessed by Slaanesh and the greatest swordsman of all the fell Legions imprisoned within the Eye of Terror. With his armies exhausted by unending war and consumed by their own twisted iniquities, Lucius turns to an erstwhile brother of the Emperor's Children to rebuild his strength. Faced with betrayal from without and even from within his own flesh, will Lucius discover something that even one who cannot know death should fear?