Vashtorr the Arkifane, daemon demigod of the soul forges, has fixed his gaze upon the Rock. Somewhere deep within the spacefaring battle station and fortress-monastery of the Dark Angels lies a prize that the Arkifane will spend countless lives to seize. Gathering a terrifying Balefleet around him, riding to battle aboard the most vast and grotesque Ark of Omen yet, Vashtorr closes his ironclad talons around the heart of the Dark Angels Chapter and prepares to crush it.