Haarken Worldclaimer, Herald of the Apocalypse, leads one of the mightiest traitor hosts every assembled. His mission, ordained by Abaddon the Despoiler himself, is to smash aside all Imperial resistance and claim the Nachmund Gauntlet in its entirety. This lawless place is home to pirates, xenos, traitors and renegades – yet Nachmund is strategically vital to the Imperium of Man, for it remains the most stable route known through the Great Rift. Should it fall, contact between Terra and the Imperium Nihilus would be all but lost.
As vast and dark as a sunless void, the Blackstone Fortress is a creation far beyond the ken of any race in the galaxy. In this age of darkness, in a galaxy riven with strife and horror, the desperate and intrepid alike search this Fortress for long-lost technologies that may be used to turn the tide of war.