The enigmatic Cult Mechanicum of the 31st Millennium wages war with an arsenal of arcane technology, leading legions of battle-automata and cybernetic soldiers under the cold, calculating command of their Tech-Priest overseers. As the masters of the Imperium’s technological secrets, the Lords of Mars now turn their deadly machines to the fires of the Horus Heresy, fighting for both Loyalist and Traitor causes across a galaxy consumed by war.

The Mechanicum Army Book is an essential guide for anyone looking to command a Taghmata Omnissiah force in Warhammer: The Horus Heresy. Inside, you’ll find all the rules you need to field the Mechanicum’s unique units, including their esoteric war engines, cybernetic troops, and sinister wargear. Whether aligned with the Emperor or the Warmaster, the Mechanicum brings a deadly blend of ancient science and brutal machine logic to the tabletop.

Inside this 152-page hardback book, you’ll find:

• In-depth lore and background on the Mechanicum, including their hierarchy, forge worlds, and examples of their war hosts.

• Complete rules and unit profiles for building a Mechanicum army, covering their units, weapons, and specialised wargear.

• High Tech Arcana: Detachment rules and faction traits for:

  • Archimandrite

  • Cybernetica

  • Lacrymaerta

  • Myrmidax

  • Reductor

  • Malagra

  • Macrotek

• Cybertheurgic Rites: Additional rules that represent the dark technological rituals employed by the Mechanicum in battle.

• Machina Malefica: Unit profiles for nightmarish creations tainted by the corrupting power of the Warp.

• Visual showcases with colour schemes, heraldry, and a gallery of stunning Mechanicum miniatures to inspire your army.

Please Note: You will need a copy of the Warhammer: The Horus Heresy – Age of Darkness Rulebook (sold separately) to use the contents of this book.