This gaming supplement for Warhammer: The Horus Heresy details the origins, weaponry, and usage of the super-heavy vehicles of the Legiones Astartes from their inception into the Age of Darkness. Additional rules allow you to play massive armoured assaults, including asymmetrical missions and multiplayer battles.

This 48-page softcover supplement contains:
– The Fist of the Legions: Detailed background on some of the largest armoured assets available to the Legiones Astartes.
– Mission Rules: The information you'll need to play the Vaults of Thrasis Legendary Mission, along with three Leviathan missions featuring asymmetrical objectives.
– Additional Profiles and Liber Addenda: New Battlefield Assets, a Unit Profile for the Whirlwind Missile Tank, and rules for Legion Decurion upgrades for the Fellblade Super-heavy Battle Tank and the Falchion Super-heavy Tank Destroyer.