Recaps

Bona’s wish to help humanity led him from the Great Crusade into the Warp, where he witnessed the Horus Heresy and became a powerful force in its devastation. Ten thousand years later, he awakened, reunited with Horus, and opened a path to the Emperor, who remained upon the Golden Throne.

• Bona begged to help at the northern front, rallied routed soldiers, and destroyed a War Fortress with his psychic power, though the blast killed most of the forces nearby.
• Bona studied the Thunder Warriors’ unstable genes and developed a treatment that restored Scher’s memory, prompting the Emperor to abandon his order to execute the uncontrollable warriors.
• The Four Gods drew Bona into the Warp and showed him visions of the Imperium’s future, while Horus grew resentful of Bona’s place in the Emperor’s esteem.
• Bona fought his way through the Chaos Gods’ domains and reached Horus on Davin, where a monstrous figure defeated Horus and began the Horus Heresy.
• After discovering that his mutated body had committed atrocities, Bona killed Fulgrim and later confronted Khorne, but Khorne defeated him and he fell through a Warp Rift.
• The Lord of Change showed Bona that countless altered histories still led to humanity’s fall and the Emperor on the Golden Throne, then sent him away to rest for ten thousand years.
• Arlith and Captain Dakan awakened Bona in 982.M41, where he learned Horus’s soul had survived inside him and agreed to help Horus obtain a body.
• Bona brought his companions aboard the Righteous Protector, opened a rift to reveal the Emperor on the Golden Throne, and saw the Emperor turn his gaze toward Cadia.

Bona gathered allies and rescued Yvraine from Commorragh, then recruited Astartes under Huron Blackheart and began building a force in the Eastern Fringe. After taking control of Taranct III and proposing reforms for its people and armies, Bona arrived at a remote Forge World to seek support.

• Bona stole a relic from the cathedral on Atas, learned about the Ecclesiarchy, and agreed with Horus to build forces in the Eastern Fringe.
• Bona lured the Drukhari to the Righteous Protector and entered Commorragh, where he rescued Bals and Gagags before finding Yvraine.
• Bona opened a Warp rift to bring daemons into Commorragh, escaped with Yvraine and Visarch, and used her dreams to show her Roboute Guilliman.
• Bona brought Bals to Huron Blackheart, where Bals condemned Huron for abandoning the Emperor, and then recruited about two thousand Astartes from the Maelstrom.
• Horus killed Black Legion warriors who recognized him and decided to rebuild the Luna Wolves under Bona’s command.
• Bona’s forces landed on Taranct III, subdued the Imperial regiment after Bona stopped its ambush, and agreed to a three-month truce with Colonel Sakot.
• Bona proposed relocating the Hive City’s population, developing Wasteland Worlds, and placing Astartes under a Legion Code of War that protected civilians.
• Bona negotiated with Magos Dorkerson for Mechanicus support, then arrived at the Forge World Asdenak, where Fabricator-Archmagos Antonia considered his request to land.

Bona built the Black Adeptus Mechanicus and the Dawn Army, then launched a crusade that seized worlds and clashed with Imperial forces. The arc left Horus facing the Imperial assault on Hexen as Custodians and Grey Knights arrived.

• Bona forced Archmagos Antonia to accept the Edict of the Black Adeptus Mechanicus, and Antonia joined as its first Fabricator-General.
• Bona recruited Orks, developed new Astartes procedures, hired Kozelian, and enlisted Colonel Sakot to build the Dawn Army on independent Tarankd.
• Bona launched the Dawn Crusade with Horus and eight hundred new Astartes, defeating the Imperial fleet and capturing Cabalide II.
• Bona identified the Necrons as a threat, reconsidered the role of faith, and traveled to Ultramar, where he manipulated Guilliman’s dreams before escaping the Fortress of Hera.
• Horus and Bona expanded their empire across the Eastern Fringe and prepared Hexen for the Imperial expeditionary force led by Inquisitor Achilles.
• Imperial forces landed on Hexen and advanced against the Dawn Army, while Titus and the Ultramarines fought the inexperienced but powerful Luna Wolves.
• Dorkerson’s Wrath of the Omnissiah devastated the Titan Legion, and Kobel’s Second Company boarded and disabled the surviving Warlord Titan.
• Horus led the Luna Wolves against the Imperial assault on the Main Fortress, where Titus and Sicarius fought him before Custodians and Grey Knights arrived.

Bona and Horus’s Dawn Army battled the Imperium, while Guilliman returned to lead the defense of Terra and confront the crises surrounding Magnus, the Aeldari, and Chaos. The arc ended with Bona ordering the reconstruction of an ancient planet-destroying weapon as Rogal Dorn reunited with Guilliman.

• Horus withdrew from Hexen after Bona’s Dawn Fleet defeated the Imperial forces, and Bona captured millions of soldiers while Horus claimed the Ork boss’s position.
• Abaddon’s attack destroyed Cadia, while Bona ordered the Dawn Army to suspend hostilities and Horus uncovered Alpha Legion infiltrators.
• Cawl, Yvraine, Celestine, and their allies awakened Guilliman on Macragge, where he led the defense against Chaos and set out for Terra.
• Magnus diverted Guilliman’s fleet into the Maelstrom, where Horus rescued Guilliman from Kairos and Bona defeated Skarbrand.
• Horus and Guilliman fought Magnus on Luna, and Bona drained Magnus’s power before Guilliman returned to Terra as the Blood God threatened the Imperial Palace.
• Bona showed Magnus the Emperor’s past and led an assault on Kaelor Craftworld, where he killed the Avatar of Khaine and ordered the Craftworld destroyed despite Yvraine’s plea for peace.
• Bona rejected proposals to expand several dangerous weapons and technologies, but ordered Fabricator-General Antonia to recreate an ancient weapon that had destroyed star systems.
• Rogal Dorn reached the Imperial Palace, reunited with Guilliman, and said he had returned because the Imperium needed the Imperial Fists.