This 48-page softcover supplement contains:
– In-depth Lore: Detailed background on the Custodians’ role in the Burning of Prospero, and of the elements of the Legio Custodes which joined the Censure Host.
– Additional Mission: A full Historical Mission that allows players to recreate the Fall of the Domus Tenebri which pitted the Daemons of Tzeentch against the Emperor’s Custodians.
– Daemons of Tzeentch Army List: A full Army List for the Daemons of Tzeentch including a new Psychic Discipline and rules which allow these Units to be included in Thousand Sons Armies.
– Unit Profiles: Additional rules for a new Adjutorum Sodality unit for the Legio Custodes, and 2 new cohorts for the Solar Auxilia.

You will need the Warhammer: The Horus Heresy – Age of Darkness Rulebook, Liber Custodes, Liber Hereticus, and Liber Auxilia, all available separately, to make full use of this gaming supplement.