Warhammer: The Horus Heresy - Legions Imperialis - The Rise of the Dark MechanicumDuring the Age of Darkness, the Mechanicum of Mars split in two, just as the Astartes did. Fueled by righteous fury on both sides, they tore into each other with the most devastating weaponry unleashed during those bleak times, holding nothing back. Contained within this 128 page hardback book you will find a comprehensive history of the rift that tore the Mechanicum apart, detailing the corrupt technologies employed by the Dark Mechanicum, as they