– Rules and unit profiles covering every unit, weapon, and piece of wargear available to the Taghmata Mechanicum, Titan Maniples, and Knight Houses in Warhammer: The Horus Heresy
– Warlord Traits, a unique Reaction, Cybertheurgy, and Orders of High Techno-arcana for bringing the esoteric abilities of the Mechanicum to the tabletop
– Rules for fielding two Divisio Tactica: the Titan Legions and the Questoris Households
– Profiles for three unique characters – Calleb Decima Invictus for Loyalists, and Archmagos Draykavac and Archmagos Anacharis Scoria for Traitors
– A visual showcase for a variety of Mechanicum forces, containing heraldry markings, iconography, colour schemes for infantry and vehicles, and a small gallery of stunning photography

In order to use the contents of this book, you will require a copy of the Warhammer: The Horus Heresy – Age of Darkness Rulebook.