The Horus Heresy: Journal Tactica: Mailed Fist

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.