Warhammer 40k - Sabbat Worlds Short Story - The Headstone and the Hammerstone Kings by Matthew Farrer

Heritor Asphodel died on Verghast, killed by the heroic Colonel-Commissar Gaunt, but his legacy lives on. In a graveyard of dead technology, agents of the Adeptus Mechanicus search for anything that can be salvaged and live again in service of the Machine God. But not everything in the graveyard is Imperial in origin. Some of Heritor Asphodel’s famed and feared Woe Machines lie hidden in the dark, awaiting activation and the chance to wreak havoc in the name of the Dark Gods...