This 48-page softcover supplement contains:

– The Fist of the Legions

– Mission Rules

– Additional Profiles and Liber Addenda

You will need a copy of the Warhammer: The Horus Heresy – Age of Darkness Rulebook and either Liber Hereticus: Traitor Legiones Astartes Army Book or Liber Astartes: Loyalist Legiones Astartes Army Book to make full use of this supplement.