Chapter Summaries

The chapter recounted how the Sapphire King exploited the Iron Hands’ hatred of flesh and suppressed emotions, and how Stunus led them to defeat the daemon by unleashing their fury. Centuries later, Stunus felt that same nameless anger as footsteps approached the Iron Hands’ formation aboard the Mechanical Ark.

• The Sapphire King corrupted Iron Hands through their grief over Ferrus Manus and their obsession with replacing flesh with machinery.
• In the Gaodinian Galaxy, Iron Father Christos merged with a Slaanesh factory, and his followers turned on their comrades.
• Stunus arrived with reinforcements and ordered the Iron Hands to release their fury, turning the daemon’s curse into a powerful attack.
• The Iron Hands destroyed the Slaanesh daemons and blasted the Sapphire King into scraps, then gradually changed their extreme ways.
• Centuries later, Stunus stood at the front of the Iron Hands’ formation aboard the Mechanical Ark and felt a sudden anger as footsteps approached.

Stunus prepared the Iron Hands to face the approaching White Scars and Raven Guard, while Jaghatai learned that Fulgrim had been married multiple times. The chapter left Jaghatai stunned as Fulgrim began recalling his wives.

• Stunus admired the White Scars' battle-worn armor and martial pride, though he regretted their preference for light weapons.
• Stunus recognized the Raven Guard and recalled the Iron Hands' past betrayals of them and other allies, which filled him with shame.
• As the White Scars and Raven Guard approached within five hundred meters, Stunus ordered the Iron Hands to prepare for combat and fired blank rounds from his Storm Bolters.
• Jaghatai asked Fulgrim why Stunus was firing, and Fulgrim guessed it was a wedding-style salute.
• Jaghatai realized Fulgrim had attended his own weddings, then asked about his wives, prompting Fulgrim to reminisce about Helenus and Clinia.

Fulgrim and Jaghatai discussed Fulgrim’s former wives before Stunus met Kor'sarro Khan and Colvin after the battle. Stunus offered Colvin equipment to address the Iron Hands and Raven Guard conflict, but Colvin’s indifferent reaction left him discouraged.

• Jaghatai asked Fulgrim how he had been with his ordinary-human wives, and Fulgrim explained that their marriages had been political.
• The White Scars and Raven Guard halted before the Iron Hands, and Stunus introduced himself to Kor'sarro Khan.
• Stunus offered to forge Kor'sarro a mechanical leg, but Kor'sarro declined and hinted that his injured leg was unusual.
• Stunus approached Colvin and said the conflict between the Iron Hands and Raven Guard needed to be addressed.
• Stunus offered Colvin equipment for a hundred-man company, but Colvin barely reacted and sighed, leaving Stunus discouraged.

Colvin rejected Stunus’s generous offer of Iron Hands supplies, believing the Raven Guard had no need for them, while Stunus mistook his melancholy for resentment. A strange vision of Fulgrim drove Stunus and the Iron Hands to attack, but a streak of white light stopped Stunus’s axe and swept toward the charging warriors.

• Colvin brooded over the Raven Guard’s isolation as they watched Jaghatai and the White Scars bond, while Lin Fan promised to bring back Corax.
• Stunus offered Colvin additional weapons, armor, supplies, and a support beacon to mend relations between their Chapters.
• Colvin refused the offer, and Stunus took the rejection as a deliberate insult.
• Stunus hallucinated Fulgrim and the Emperor’s Children, then roared and swung his power axe at the vision.
• The Iron Hands charged the apparent Emperor’s Children as their Devastators prepared to fire, but a streak of white light blocked Stunus’s blow and headed toward the advancing warriors.

Jaghatai Khan swiftly knocked down the Iron Hands forces to stop them from attacking, while Fulgrim let Stunus vent his fury by beating him. The chapter ended with Fulgrim battered but alive, lamenting that he was not dead.

• Jaghatai Khan struck down Stunus and overwhelmed the Iron Hands’ front ranks and Destroyers in three seconds.
• The White Scars cheered for Jaghatai, who silenced them with a glare.
• Stunus recovered, saw Fulgrim, and punched him in the face.
• Stunus repeatedly beat Fulgrim until his own Iron Hand broke and Fulgrim’s face was left battered.
• Fulgrim opened his eyes and told Stunus that he was not dead, adding that this was terrible.

Jaghatai stopped Stunus from attacking Fulgrim and persuaded the Iron Hands to sit and listen. Stunus then asked how Jaghatai had found and rescued Fulgrim from the Eye of Terror, leaving Jaghatai to explain the Primarchs’ return.

• Jaghatai lifted Stunus away from Fulgrim and ordered him to calm down and talk.
• Jaghatai introduced himself and Fulgrim to the Iron Hands, who demanded permission to attack Fulgrim.
• Stunus asked Jaghatai whether he was loyal to the Emperor, then ordered the Iron Hands to sit and listen.
• Perturabo restored the Iron Hands’ communications, while Rogal Dorn and Yvraine left to attend to other tasks.
• Stunus asked how Jaghatai had found Fulgrim in the Eye of Terror and taken him from the Ruinous Powers, and Jaghatai said the answer was complicated.

Jaghatai explained to Stunus that the traitor Primarchs were being returned so The Emperor could judge them, while Fulgrim appealed to Stunus by invoking Ferrus Manus's hopes for the Iron Hands. The chapter left Stunus facing deep divisions over whether the Iron Hands should embrace humanity or remain governed by steel and reason.

• Jaghatai told Stunus that The Emperor had tasked him with bringing His fallen children back to face judgment, but Stunus remained doubtful.
• Fulgrim told Stunus that he would not ask forgiveness for killing Ferrus Manus and instead wanted to convey Ferrus's wishes for the Iron Hands.
• Fulgrim recalled that he and Ferrus had been close and understood Ferrus's hopes, prompting Stunus to consider his father's disappointment with the Iron Hands.
• The Iron Hands' creed of rejecting weakness and treating themselves as tools had become a source of conflict after the Sapphire King's destruction and the loss of a third of the Chapter.
• Some Clan Chiefs sided with Stunus's belief in the Iron Hands' humanity, while others insisted the Chapter should be steel within and without; Stunus's authority weakened after the war ended.

The chapter described how the Iron Hands reshaped the Codex Astartes around the Iron Council and examined Ferrus’s legacy on Medusa. It ended with Ferrus’s true message to Stunus: uphold humanity with iron armor and a heart of flame.

• After the Horus Heresy, the Iron Hands blamed Ferrus’s authority and emotional decision at Isstvan for their defeat and made the Iron Council the Legion’s real center of power.
• The Iron Fathers adapted the Codex Astartes to the Iron Hands’ traditions, while keeping their changes secret and maintaining standard company sizes for the Inquisition.
• Lin Fan planned to have the Ynnari teach Medusa’s Astropaths safer, more effective psychic communication methods.
• The chapter described Medusa’s lethal environment, its clan wars, and Ferrus’s Iron Moon recruitment ritual, in which Iron Fathers and Iron Priests selected young fighters.
• Ferrus had intended to end the clans’ hatred, remove the silver metal from his arms, and transform Medusa, but his death left the Iron Hands and the planet divided and increasingly brutal.
• Fulgrim passed Ferrus’s intent to Stunus, urging him to uphold humanity with iron armor and a heart of flame.

Fulgrim challenged Stunus’s faith in machinery and argued that humanity’s strength came from a will passed down through generations. Stunus remained wary of Fulgrim and the Emperor’s Children, and the chapter ended as Jaghatai restrained his engineering claw.

• Stunus misunderstood Fulgrim’s phrase “Ironclad, Fiery Heart,” prompting Jaghatai to laugh before Fulgrim explained its meaning.
• Fulgrim told Stunus that flesh was weak but will endured, then questioned whether machinery could overcome human weakness.
• Fulgrim described Medusa’s ancient relics and ruined civilizations, leading Stunus to reconsider the Iron Hands’ devotion to technology.
• Fulgrim said that inherited will, rather than any one person’s will, could keep humanity from repeating the past.
• Stunus called Fulgrim a traitor and accused him of preparing to praise Slaanesh, while Jaghatai pinned Stunus’s engineering claw beneath his palm.

Stunus rejected Fulgrim’s explanation and called the Iron Hands to attack, turning the meeting into a battle with Jaghatai and the White Scars. As Lin Fan watched the White Scars overwhelm the Iron Hands, he asked the Emperor to bring Ferrus Manus down.

• Jaghatai subdued Stunus after Stunus’s armor fired a laser and began deploying bombs.
• Fulgrim tried to explain his new beliefs, but Stunus accused him of serving the Changer of Ways and ordered the Iron Hands to purge the alleged heretics.
• Jaghatai led the White Scars into battle against the Iron Hands, while Fulgrim refused to take part in suppressing them.
• Protected by Aegis shields, Jaghatai and the White Scars broke through the Iron Hands’ formation as Lin Fan arranged for medicine and technical support.
• Lin Fan contacted the Emperor and asked him to have Ferrus Manus come down.

Lin Fan learned that the Emperor planned for Ferrus and the Legion of the Damned to confront Fulgrim and free his soul from Chaos, then asked the Emperor to let Ferrus meet his children. After the Emperor’s communication ended, Jaghatai’s White Scars defeated the Iron Hands, and Tau medical and technical crews began separating the wounded Marines from their crude augmentations.

• The Emperor told Lin Fan that he had delayed Ferrus’s return because he foresaw Ferrus rescuing Guilliman from Fulgrim and helping purify Fulgrim’s soul.
• Lin Fan asked the Emperor to arrange for Ferrus to visit his children, and the Emperor instructed him to throw the holy icon into a fire.
• Lin Fan saw that Jaghatai’s White Scars had defeated the Iron Hands, while Jaghatai argued with Stunus and knocked him unconscious.
• Yilafren’s medical and technical crews arrived to treat the wounded Iron Hands and recover their armor and components.
• A Lamenter technician directed the crews to remove unsafe augmentations, preserve selected parts, and give one injured Iron Hand a limited dose of healing agent.

Ferrus Manus joined the Legion of the Damned and fought Nurgle’s endless daemon hordes beside The Emperor. The Emperor then summoned him for a task concerning the Iron Hands and sent him away from the battlefield.

• A loyal soul chose to keep fighting for humanity and became a warrior of the Legion of the Damned.
• Ferrus Manus appeared beneath the Golden Throne, and he and the Legion joined The Emperor’s battle against Nurgle in the Warp.
• Ferrus Manus and the Legion slaughtered millions of plague daemons, while Nurgle’s crucible continued producing more.
• The Emperor called Ferrus Manus and told him he had a task concerning his sons, the Iron Hands.
• The Emperor soothed Ferrus Manus and transported him from the battlefield.

Jaghatai reflected on the losses he had suffered during the Horus Heresy and began writing a history of humanity, including a fuller account of his own era. As he spoke with Fulgrim, he asked about Ferrus’s flaws and learned that Fulgrim thought Ferrus cared too little about other people’s feelings.

• The Emperor recalled Ferrus’s deep love for Fulgrim and the fury Fulgrim’s betrayal had unleashed, then sent Ferrus away without saying Fulgrim’s name.
• Jaghatai remembered the brothers and comrades he had lost during the Horus Heresy, including Hasik, Qin Xia, and Yesugei.
• Jaghatai explained to Fulgrim that he was recording Yesugei’s deeds and intended to write a history of humanity, beginning with a detailed account of their era.
• Jaghatai asked Fulgrim about Ferrus’s personality flaws as part of his effort to understand the breakdown between the Iron Hands and Emperor’s Children.
• Fulgrim recalled his time with Ferrus and told Jaghatai that Ferrus cared too little about other people’s feelings.

Jaghatai listened as Fulgrim described his close but strained friendship with Ferrus, then reflected on adapting Imperial history for younger audiences. Fulgrim recounted Ferrus’s failed bid to prove himself as a Warmaster candidate, which ended in victory at the cost of Guilliman’s regiments and the Emperor’s Children captain.

• Fulgrim confided that Ferrus often dismissed his artistic pursuits, and Jaghatai considered how their different temperaments had put pressure on their friendship.
• Jaghatai reflected on his historical writing and his plan to create gentler, child-friendly versions of Imperial history.
• Fulgrim recalled that Ferrus’s last expedition had been a joint operation with the Emperor’s Children and Guilliman’s forces, and that the Second Company captain and three Ultramarines regiments had been lost.
• Ferrus had sought to demonstrate his command ability in the Warmaster contest, but abandoned detailed micromanagement and instead divided the planet with an iron tide before launching a coordinated assault.
• Ferrus’s strategy annihilated the enemy, but he used Guilliman’s three regiments as cannon fodder and the Emperor’s Children captain was killed.

Fulgrim and Jaghatai reminisced about Ferrus Manus and Guilliman, easing Fulgrim’s anxiety about reuniting with Ferrus. Jaghatai secretly imagined a scandalous story about Fulgrim and Ferrus, but Fulgrim caught a Slaanesh demon born from Jaghatai’s thoughts before they hurried off to join Perturabo.

• Fulgrim told Jaghatai how Ferrus Manus had rejected his attempt to reconcile with Guilliman, and the two laughed about Guilliman’s admiration for Ferrus.
• Jaghatai thanked Fulgrim for sharing his troubles, then became inspired to write a romance about a gender-swapped Fulgrim and Ferrus Manus.
• Fulgrim noticed a Slaanesh demon near Jaghatai and caught it, while Jaghatai tried to hide that it had emerged from his thoughts.
• Perturabo called Fulgrim and Jaghatai over, and Fulgrim handed the demon to Jaghatai before rushing out.
• Jaghatai sealed the demon in a bone cylinder, while the Emperor realized Slaanesh had influenced the Primarchs’ thoughts.

Yvraine prepared a ritual to summon the Emperor’s incarnation of the Flame of Vengeance, while Lin Fan discussed the Legion of the Damned and Celestine with her. The Primarchs and Iron Hands gathered to witness the summoning as the ritual’s heat began to consume the hall.

• Yvraine located the Flame of Vengeance and said it would descend when the rune flashed thirteen times, turning everything nearby to ash.
• Yvraine described the Legion of the Damned as the Emperor’s daemons and said Celestine retained far more humanity; Lin Fan said the dead should be allowed to rest once the war was over.
• Rogal Dorn, Perturabo, Jaghatai, Fulgrim, and the Iron Hands arrived, while Lin Fan sensed Konrad Curze watching from the shadows and learned Angron remained secluded.
• Iron Hands Chapter Master Stunus cursed the Aeldari and resisted being carried by servitors; Jaghatai went to quiet him and prepared to use force.
• The hall’s temperature suddenly soared, the waterfall dried up, and the Wraithbone crackled as the ritual’s power began to manifest.

Ferrus Manus emerged from the Warp on an Aeldari Craftworld and attacked Fulgrim, blaming him for his betrayal. After his brothers restrained the fight, Rogal Dorn tried to explain that the strange gathering was real, leaving Ferrus Manus bewildered.

• Ferrus Manus emerged from the ritual array and recognized Fulgrim, then charged at him in rage.
• Ferrus Manus seized Fulgrim by the throat while Yvraine and the seers restrained the spreading flames.
• Perturabo, Jaghatai, and Rogal Dorn intervened; Jaghatai severed Ferrus Manus's arm and rescued Fulgrim.
• Perturabo trapped Ferrus Manus in a Wraithbone net, but Ferrus Manus began melting it with Binding Fire.
• Rogal Dorn confronted Ferrus Manus, who looked around at the gathered Primarchs and Aeldari and suspected they were in a Tzeentch daemon's illusion.
• Rogal Dorn told Ferrus Manus that the scene was real.

Ferrus attacked Rogal Dorn, and Jaghatai joined the fight before Perturabo unveiled his Iron Wings. Perturabo drove Rogal Dorn and Jaghatai away from Ferrus and prepared to face him alone.

• Ferrus broke free and hammered Rogal Dorn’s shield, driving him backward across the hall.
• Jaghatai attacked Ferrus, dodged a hammer bursting from Ferrus’s shoulder, and cut his knee before retreating from a massive blow.
• Perturabo called down a drop pod, then flew into the hall using his newly made Iron Wings.
• Rogal Dorn questioned the wings’ design, while Jaghatai compared their appearance unfavorably to Mortarion’s fly wings.
• Perturabo fired iron feathers at Rogal Dorn and Jaghatai, forcing them away from Ferrus and declaring that he would fight Ferrus alone.

Perturabo fought Ferrus and unveiled Serenity, a weapon combining Golden Age, Necrontyr Blackstone, and Aeldari runic technology. Its violent psychic currents scattered Ferrus’s fiery form, leaving Perturabo confident he could defeat his brothers and reclaim Mortarion and Magnus.

• Perturabo directed Iron Bone robots to bombard Angron, who endured the barrage and tore apart the machines.
• Perturabo attacked Ferrus with his armor’s weapons, but Ferrus deflected or warped much of the barrage and fired back with his transformed arms.
• Ferrus caught Perturabo and struck his chest with a heavy hammer, but Perturabo stayed conscious and taunted him.
• Perturabo activated Serenity, splitting his iron wings into sixteen runic arrays that released a torrent of energy and psychic force.
• Ferrus struggled to hold his fiery shape as Serenity repeatedly scattered him, and Perturabo resolved to lead an assault on Nurgle’s Garden to retrieve Mortarion and Magnus.

Ferrus gained the upper hand against Perturabo, but their brutal fight continued as Perturabo’s reinforcements arrived. Stunus struggled with what Ferrus’s return might mean for the Iron Hands, while Lin Fan and Trazyn remained confident the Primarchs would survive.

• Jaghatai criticized Perturabo’s smug expression, while Stunus saw Ferrus’s fury and worried that the Iron Hands had strayed from their father’s ideals.
• Ferrus exploited gaps in Perturabo’s attacks, and his Warp-sensing ability let him overwhelm the Iron Wings.
• Ferrus’s and Perturabo’s powers collided in an explosion that left Dorn and Jaghatai singed and sent Perturabo crashing to the ground.
• Ferrus straddled Perturabo and battered his armor, but Perturabo struck back with a Blackstone-spiked hammer, and the two continued fighting at close quarters.
• Lin Fan prepared to intervene, but Trazyn reassured him that the Primarchs would be fine.
• Dozens of drop pods landed, bringing Perturabo’s upgraded Iron Circle Robots as reinforcements.