The battles of Warhammer: The Horus Heresy are rife with swift Reactions, mighty Warlords, and forbidden Psychic Powers. This handy deck of reference cards makes it easy to keep track of new rules and mechanics, so you can focus on your strategy. These cards will ensure you can take full advantage of the new Reaction system – they work as both a reminder to use them, and a rules reference for you and your opponent.

Praetors are the mightiest warriors and battle-leaders of the Space Marine Legions, second only to the god-like Primarchs in martial skill and generalship. Amongst their ranks can be found chapter masters and lord commanders, captains and khans, warsmiths and jarls, as the traditions of their Legions dictate. Each is a vastly experienced warrior and warlord who has writ for themselves a legend in blood, and carries into battle the finest wargear and weapons known to humanity, leading hosts that have conquered worlds unnumbered.

Praetors are the mightiest warriors and battle-leaders of the Space Marine Legions, second only to the god-like Primarchs in martial skill and generalship. Amongst their ranks can be found chapter masters and lord commanders, captains and khans, warsmiths and jarls, as the traditions of their Legions dictate. Each is a vastly experienced warrior and warlord who has writ for themselves a legend in blood, and carries into battle the finest wargear and weapons known to humanity, leading hosts that have conquered worlds unnumbered.

Prideful and impetuous, Geigor Fell-Hand is a Thegn of the Space Wolves with a long record of valorous deeds. Yet despite his skill and fury as a warrior, Geigor's record as a commander is marred by a number of battlefield reversals – most notably the loss of his entire war pack while fighting alongside the Thousand Sons, after his allies retreated in the face of an Ork onslaught. Geigor harboured a bitter grudge against the XV Legion for this perceived betrayal – and leapt at the chance to punish them in the Censure of Prospero.

Ahzek Ahriman has the unique distinction of being both the first and last Chief Librarian of the Thousand Sons, and is the most gifted mystic among their already-formidable psyker corps. A respected commander even before his Legion's reunion with its missing Primarch, Ahriman's keen intelligence and talent in warpcraft soon made him Magnus' foremost apprentice, but his greatest strength is his indefatigable will. Ultimately, this determination would see him play a pivotal role in the Burning of Prospero – and walk strange and terrible paths long after the close of the Horus Heresy.

Solar Auxilia Tactical Command Sections are specialists in battlefield command and control. Led by a Captain or similar sub-commander, these expert sections facilitate the flow of orders, direct the tercios, and co-ordinate artillery and orbital operations. This vital role is mirrored by the junior Line Command Sections who lead frontline troops, while the most powerful and celebrated officers of the Solar Auxilia, known broadly as Legate Marshals, instead go to war with personal guards equipped from their private armouries.

The Warmaster’s own Legion are unleashed on the field as dark exemplars of the Astartes, cursing the Emperor’s name. Show your loyalty to Lupercal with this set of Sons of Horus-themed dice.

The Solar Auxilia are the most elite division of the Imperial Army, trained and equipped to fight in the most hazardous environments. Their cohorts are recruited from all over the Imperium, drawing on void-born asteroid clans, ambitious noble scions, and underhive scum alike. Whatever their origins, those who display the right combination of aggression, discipline, and skill-at-arms can win glory and greatness by leading the advance of the Imperium's tercios.

Heavy Support Squads provide the Legiones Astartes with mobile, infantry-portable firepower sufficient to bring down hordes of enemy troops or smash armoured vehicles apart with withering hails of fire, combining devastating armaments with all the flexibility of a footsoldier. Heavy flamers project a roaring torrent of burning promethium capable of incinerating infantry and flushing foes from cover, while multi-meltas reduce enemy tanks to molten slag with a flash of energy, and plasma cannons unleash volatile blasts of superheated matter.

Heavy Support Squads provide the Legiones Astartes with mobile, infantry-portable firepower sufficient to bring down hordes of enemy troops or smash armoured vehicles apart with withering hails of fire, combining devastating armaments with all the flexibility of a footsoldier. Volkite culverins emit scorching heat rays that burn through swathes of infantry, while versatile autocannons spit shells that shred troops and light vehicles alike. Lascannons are the most powerful laser weapons available to Legionaries, firing devastating beams to punch clean through tank armour.

Tactical Support Squads replace the utilitarian bolter of their comrades with more specialised weapons, enabling a Legiones Astartes strike force to act with even more versatility and engage a wider range of targets on its own terms. Each of the armaments used by Tactical Support Squads has its place – flamers are ideal for clearing bunkers, trenches, and urban zones, while rapid-firing rotor cannons see use against hordes of lightly-armoured foes. Meltaguns provide bursts of thermic energy for tank-busting, and volatile plasma guns can melt even heavily-armoured elites. Arcane volkite weapons – both the volkite caliver and lighter volkite charger – sear through targets with beams of thermal energy.

Heavy Support Squads provide the Legiones Astartes with mobile, infantry-portable firepower sufficient to bring down hordes of enemy troops or smash armoured vehicles apart with withering hails of fire, combining devastating armaments with all the flexibility of a footsoldier. Heavy bolters are the largest bolt weapons available to infantry, unleashing a storm of shells that tear apart enemy formations, while missile launchers are prized for their versatility, offering a variety of explosive munitions suited to eliminating infantry, tanks, or aircraft.