Liber Custodes (3rd Edition)

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The Horus Heresy (Game)

Liber Custodes
Released	March 2026
Pages	120
Preceded by	Liber Imperium (2nd Edition)

The Liber Custodes is a supplement to the Horus Heresy: Age Of Darkness 3rd Edition Rulebook by Games Workshop.^[1]

Description

The Custodians are the finest warriors known to the Imperium, outfitted from the secret arsenals of the Emperor himself. They serve both as protectors – of the Emperor’s person, domain, and secrets – and as aggressors, executing those who might betray the Emperor and prosecuting the Great Crusade’s most pivotal campaigns. Their warships, vehicles, weapons, and wargear are utterly unparalleled and are the apex of the Imperium’s military might.

This book is an essential guide for anyone who wants to command the Legio Custodes, the Anathema Psykana, and the Divisio Assassinorum in Warhammer: The Horus Heresy. It contains the rules you need to field the most powerful units available to the Imperium, along with Detachments, Wargear, and special rules which make the forces of the Emperor so potent on the tabletop.^[1]

Contents

– Background and lore: A deep dive on the Talons of the Emperor, including the Legio Custodes, Anathema Psykana, and Divisio Assassinorum.

– Rules and unit profiles: A guide to army building, plus rules for units, weapons, and Wargear available to the Legio Custodes in Warhammer: The Horus Heresy.

– Detachments: Rules for five Detachments for the Legio Custodes: Moritoi Convocation, Hykanatoi Convocation, Tharanatoi Convocation, Ephoroi Convocation, and Kataphractoi Convocation.

– Army Lists: Guidelines for building armies of Legio Custodes, Anathema Psykana, and Agents of the Divisio Assassinorum, as well as Advanced Reactions and Gambits.

Sources

• 1: Games Workshop (last accessed 3/4/2026)