Chapter Summaries

Kesha and her allies arrived on Mars to confront the Void Dragon fragment, but its bond to the planet made a direct attack too dangerous. Lan appeared and offered to assess the threat, prompting an unprecedented warning from the fragment as his power reached into Mars.

• Kesha and He Xi assessed the Void Dragon fragment and warned Guilliman that fighting or removing it could devastate Mars and the Solar System.
• Iglanias offered to duel the fragment, but Liang Bing and Kesha explained that the planet would still be endangered.
• Lan appeared in the forge temple, and Obi-Wan Kenobi recognized him as an Arbitrator.
• Lan confronted Liang Bing over her interference with an Arbitration Mechanism mission, but postponed punishment after Liang Bing invoked Pandora and the Emperor.
• Lan turned his attention to the Void Dragon fragment and spread a gentle ripple through Mars, triggering an unprecedented warning in the fragment's consciousness.

Lan entered the Emperor’s sealed labyrinth on Mars and confronted the Void Dragon, attacking it with the authority of the Hunt. As their battle threatened to destroy the planet, Kesha used the Throne of the Heavenly Blade to stabilize Mars, while the Void Dragon’s defeat became increasingly clear.

• Dalia Secila recognized Lan’s Crystal Cross badge, ordered the sentinels to stand down, and guided the group through the labyrinth.
• Lan shielded the group from the Void Dragon’s psychic corruption, then passed through the Emperor’s seal into its core chamber.
• Lan attacked the Void Dragon with a Hunt arrow that erased part of its essence, prompting it to break its chains and retaliate.
• Lan countered the Void Dragon’s attacks with changing stellar weapons as the battle shook Mars and began tearing the Void Dragon apart.
• Kesha unfolded the Throne of the Heavenly Blade’s Holy Domain, halting Mars’s collapse, while the shattered seal revealed Lan’s fight and the Void Dragon’s weakening form.

The Void Dragon accused its attackers of unfairly ganging up on it, leaving the gathered Imperium forces and Lan uncertain whether the C’tan fragment had truly deserved its fate. After Pandora called it a poor little dragon, the Void Dragon gave up and waited for its end, while the Hilling group debated what to do with it.

• The Void Dragon blamed Iglanias for withholding warning and accused Lan, He Xi, Kesha, Guilliman, and the others of attacking it without cause.
• Iglanias ignored the Void Dragon’s complaints and stayed close to Pandora, while Lan wondered whether the fragment had been wronged.
• Kesha questioned He Xi and Guilliman about the Void Dragon’s past, but neither the Imperium’s records nor the gathered experts revealed evidence of its crimes.
• Pandora called the Void Dragon a poor little dragon, prompting it to fear being kept as a pet and abandon resistance.
• The Void Dragon fell silent and waited for its fate as the Hilling group considered how to deal with it.

Iglanias urged the defeated Void Dragon to join the Hilling Empire, while Guilliman proposed using the C’tan’s energy to ease the Emperor’s burden. Kesha and the others went to inspect the Golden Throne, where they paid their respects to the Emperor.

• Pandora patted and teased the battered Void Dragon as Iglanias contacted it privately.
• Iglanias described the Hilling Empire’s powerful allies, its own improved condition, and the promise of a path to greater strength, persuading the Void Dragon to consider joining the Empire and pledging loyalty to Pandora.
• Guilliman proposed using the Void Dragon’s energy to support the Golden Throne, but He Xi warned that its unstable power could cause a disaster.
• Kesha decided that Lan would watch the Void Dragon while she and the others inspected the Golden Throne.
• Guided by Trajan into the Golden Throne Hall, Kesha, Liang Bing, and He Xi saw the Emperor and showed him respect for his sacrifice.

He Xi and Liang Bing determined that the Void Dragon shard could not power the Golden Throne, and the Emperor asked Kesha to take it away while warning everyone about Vashtorr. On Hilling Star, Hua Wei used the shard’s gift to create living Imperium societies on conquered planets, giving the Hilling Empire its first civilian population and social foundation.

• He Xi and Liang Bing examined the Golden Throne and concluded that the C'tan shard could not replace its soul-consuming psychic core without risking the planet’s destruction.
• The Emperor thanked Kesha, Liang Bing, and He Xi, told them to remove the Void Dragon shard, and warned them that Vashtorr’s power would grow with technological progress.
• Hua Wei opened the Void Dragon Gift Pack and received a unique Adaptive Faction Template that generated civilian societies and technology but no military forces.
• Hua Wei activated the template on several conquered planets, where cities, infrastructure, and Imperium citizens appeared across mining, agricultural, and ecological worlds.
• Hua Wei watched the new societies flourish and celebrated that the Hilling Empire finally had living citizens and a genuine foundation for civilization.

Kesha offered the Void Dragon a contract with limited freedom and help recovering its fragments, while Iglanias was promised a chance to become a reserve Arbiter. Meanwhile, Abaddon and Vashtorr led a Chaos fleet toward the Rock to seize a key fragment.

• Kesha presented the Void Dragon with the choices of permanent sealing or exile, but the Emperor’s will permitted a contract under strict conditions.
• Kesha told the Void Dragon that the Imperium could help recover its fragments and that it could propose reasonable contract terms.
• Kesha informed Iglanias that it could seek reserve Arbiter status after restoring its complete C’tan body and passing the Arbitration Mechanism’s assessment.
• Iglanias celebrated its prospect of becoming an Arbiter and gloated to the Void Dragon, which decided to consider its contract terms.
• Abaddon and Vashtorr led a Chaos fleet toward the Rock to seize a crucial key fragment.

Abaddon gathered Chaos forces to attack the Rock and seize a hidden artifact, while Lion El'Jonson prepared an ambush and Horus launched the Luna Wolves in pursuit. An enormous Ork WAAAGH! also converged on the fortress, setting the stage for a massive battle.

• Abaddon assembled the Black Legion, Iron Warriors, Word Bearers, and Vashtorr's fleet to assault the Rock and search for its hidden fragments.
• Lion El'Jonson halted his expedition, concealed part of his fleet near the Rock, and prepared to trap Abaddon's forces in a counterattack.
• Guilliman informed Horus that Abaddon was targeting the Rock, and Horus ordered the Luna Wolves to assemble and pursue him.
• Salaka the Skullcrusher rallied Ork tribes around his growing Attack Moon, and the WAAAGH! headed toward the Rock.

Abaddon and Vashtorr breached The Rock’s void shield with the Exterminator and launched a massive assault on the fortress. Lion El’Jonson’s forces fought to contain the invasion while the Lion waited to spring his trap, and Abaddon waited to locate the key fragment and his enemy.

• Abaddon ordered Vashtorr to destroy The Rock’s shield, and Vashtorr fired the Exterminator from the Ark of Omen, The Unbound Scythe.
• The Exterminator shattered Gorgon’s Blessing, allowing the Chaos fleet to bombard The Rock and send boarding forces into the fortress.
• Warsmith Leng led Iron Warriors through the breaches as Word Bearers opened Warp rifts and Chaos forces pushed into the fortress.
• The Dark Angels, including Azrael’s Inner Circle elites and upgraded warriors, ambushed the invaders while Lion El’Jonson directed the defense and held back his trump card.
• Vashtorr’s war machines and the spreading corruption forced the defensive lines back, while the Lion continued waiting for Abaddon to commit his forces.
• Abaddon watched the battle from the Vengeful Spirit while waiting to confirm the key fragment’s location and find the one who had humiliated him.

Abaddon led a Black Legion assault into the Rock and clashed with Lion El’Jonson, while Vashtorr corrupted the fortress systems with Scrapcode. Luke Skywalker stopped the sabotage and confronted Vashtorr, who fired a massive plasma blast at him.

• Abaddon abandoned his cautious advance, led his Terminators through the Dark Angels’ defenses, and forced Lion El’Jonson to leave his command throne.
• Lion confronted Abaddon in the main corridor, and the two began a fierce duel as their forces fought around them.
• Vashtorr infected the Rock’s systems with Scrapcode, turning armor and defenses against the Dark Angels.
• Luke used the Force to disable corrupted turrets, scatter Vashtorr’s Scrapcode Sages, and clear the data corruption so the Dark Angels could withdraw.
• Luke identified himself as a Jedi and challenged Vashtorr, who transformed his arm into a plasma cannon and fired at him.

Lion El'Jonson overwhelmed Abaddon while Luke unleashed immense Force power against Vashtorr, destroying an orbital Ark of Omen. An exhausted Luke exposed Be'lakor in the fortress, leaving the three in a hostile standoff.

• Lion El'Jonson drove Abaddon back with Fealty and the Emperor's Shield, taunting him until Abaddon abandoned defense and attacked wildly.
• Luke deflected Vashtorr's attacks and stopped the fortress's laser turrets from firing, then hurled their energy into space.
• Vashtorr ordered an Ark of Omen to bombard Luke, but Luke crushed the warship with the Force and flung its wreckage into space.
• As Luke's strength waned, he sensed an ambush and struck Be'lakor, breaking his stealth and injuring him.
• Vashtorr confronted Be'lakor while Luke retreated, creating a tense three-way standoff.

Lion El'Jonson's ambush crippled the Chaos fleet, but Perturabo arrived with the Iron Warriors and challenged the Lion while Abaddon rushed for the central sanctum. Horus appeared with the Luna Wolves to confront Abaddon, leaving him stunned by her return.

• With communications restored, Lion El'Jonson ordered the Imperium fleet to spring its ambush, devastating the Chaos fleet and striking its vulnerable core.
• Unknown geometric beams crippled several Arks of Omen, and Abaddon summoned reinforcements; the Word Bearers refused, but the Iron Warriors answered.
• Perturabo arrived, drove Abaddon away, and attacked Lion El'Jonson, while Abaddon led the Black Legion toward the central sanctum to seize the key fragment.
• Horus and the Luna Wolves teleported into the passageway before Abaddon, and Horus confronted him as he stared at her in disbelief.

Horus confronted Abaddon and the Black Legion, revealed overwhelming power strengthened by the Emperor’s sacred flames, and nearly killed Abaddon before his Terminators intervened. Meanwhile, the Luna Wolves overwhelmed the Chaos forces on The Rock, demonstrating their resistance to corruption and rapid healing.

• Abaddon recognized Horus’s primarch presence, but dismissed her as an Imperial counterfeit and ordered the Black Legion to attack.
• Horus fought Abaddon, resisting his Chaos powers and driving him back with her weapons and combat skill.
• Horus’s power surged with the Emperor’s sacred flames, and she severed the Talon of Horus before kicking Abaddon into the wreckage.
• As Horus prepared to finish Abaddon, Black Legion Terminators rushed in and briefly delayed her strike.
• The Luna Wolves smashed through the fortress, shrugging off Chaos corruption and rapidly healing their wounds.

Lion El'Jonson fought Perturabo inside The Rock while Horus pursued Abaddon and Vashtorr intervened to help him escape. As the Imperial fleet gained the upper hand outside the fortress, an Ork warlord and his fleet burst into the battle and charged toward The Rock.

• Lion El'Jonson and Perturabo clashed in the fortress passageways as they argued over Perturabo's betrayal and the grievances that led to it.
• Horus pursued the wounded Abaddon through the corridors while Vashtorr sought a way to escape with the key fragment.
• Vashtorr unleashed his will to turn weapons and war machines against Horus and the defenders, then seized Abaddon and dragged him away as Be'lakor followed in the shadows.
• The Imperial fleet ambushed the Chaos fleet, destroying many ships and leaving the Vengeful Spirit badly damaged.
• An Ork battle moon and fleet emerged from the Warp, and their warlord ordered them to ram into the battle around The Rock.

The Ork battle moon crashed into the battle, shattering the Imperium’s encirclement and flooding The Rock with greenskins. As Luke Skywalker and the defenders fought to contain the invasion, Vashtorr and Abaddon used the chaos to pursue the key, while the Ork warlord charged toward the Lion and Perturabo’s duel.

• The Ork fleet attacked everything in its path, forcing the Imperium to divert firepower and sending Orks into The Rock.
• The Dark Angels, Luna Wolves, Ultramarines, and Forerunner forces formed defensive lines against the greenskin assault.
• Perturabo kept the Lion pinned in the core corridor as the fortress defenses came under pressure.
• Vashtorr dragged the wounded Abaddon through a maintenance passage and breached security doors while they searched for the key.
• The Ork warlord sensed the Lion and Perturabo’s battle and led his Kill Fortress and Boyz toward the core corridor.

Horus took command of the Imperium forces and began turning the battle inside the fortress, while Abaddon and Vashtorr reached the key fragment but lost their chance to escape. The chapter left them trapped as reinforcements closed in.

• Luke calmed Horus, who then ordered Lion to transfer battlefield command to her and reorganized the Imperium forces.
• Lion accepted Horus's command and focused on fighting Perturabo and the Ork warlord, using the warlord's attacks against Perturabo.
• Vashtorr broke through the final bulkhead and found the key fragment, but Horus's orders sent Luna Wolves and Spartans to intercept Abaddon and Vashtorr.
• Abaddon fought the Luna Wolves and discovered that their wounds resisted Chaos corruption and healed, leading him to realize Horus had returned on the Imperium's side.
• Be'lakor stabbed Vashtorr's core, collapsing the Warp rift, then vanished as Vashtorr's damaged energy surge banished him.
• Abaddon and Vashtorr saw Space Marine reinforcements approaching and realized they were trapped inside the fortress with no time to open another stable Warp passage.

As the Imperium’s forces fought to retake The Rock, Vashtorr and Abaddon discovered that Blackstone technology was suppressing Chaos and hurried toward the core hall. There they found Perturabo surrounded by Imperial elites and froze when he recognized Horus.

• Vashtorr detected that Black Legion forces and Chaos energy had weakened, then identified Blackstone suppression fields throughout the fortress.
• Abaddon ordered Vashtorr to break through to the core hall, hoping to seize the key fragment and reach Perturabo.
• Vashtorr and Abaddon fought through the Orks and entered the core hall, where Perturabo and his remaining Iron Warriors were surrounded by Imperial forces.
• Lion El'Jonson, Horus, Luke Skywalker, Azrael, Dante, Luna Wolves, and Ultramarines faced the traitors in the hall.
• Perturabo recognized Horus and struggled to speak as the shock overcame his hatred and defenses.

Horus tried to convince Perturabo that the Chaos Gods had deceived them both, but Perturabo refused to forgive the Imperium. An Ork battle moon smashed into the Rock, and the Void Dragon arrived and destroyed it, leaving the battlefield’s balance transformed.

• Horus told Perturabo that the Horus who had recruited him was controlled by the Chaos Gods and offered him a chance at redemption, but Perturabo rejected her and prepared to fight.
• The Ork battle moon rammed the Rock, tearing open the core hall and destroying the fortress’s blackstone suppression nodes.
• Abaddon and Vashtorr felt their Chaos powers return as the Ork warlord prepared to fire into the hall.
• A colossal beam pierced the battle moon, triggering its destruction and killing the Ork warlord.
• The Void Dragon descended and annihilated nearby Ork ships, bombers, and several Chaos vessels.

Horus fought Daemon Abaddon after he sacrificed himself to the Four Gods for greater power, then killed him with the Emperor’s Sacred Flame. With the Warmaster dead, she turned her attention to Perturabo, who might still find redemption.

• Horus attacked Abaddon while Lion El'Jonson fought Perturabo to keep him from intervening, and Vashtorr searched for a chance to escape with the key fragment.
• Abaddon drove Drach'nyen into his own heart and summoned the Four Gods' power, transforming into a daemon empowered by Chaos.
• Horus ordered Dante, Azrael, and Luke Skywalker not to interfere, then used her skill and the Mind Cube to endure Abaddon's assault until his borrowed power faltered.
• Horus pierced Daemon Abaddon's heart with her greatsword and burned his body away with sacred flame.
• Horus stood over the battlefield and looked toward Perturabo, recognizing that her fallen brother might still be redeemed.

After the Chaos Gods withdrew from a direct intervention, Sanguinius and Horus persuaded Perturabo to surrender and go to Terra to confront the Emperor. Vashtorr escaped with the key fragment through the Chaos Gods’ intervention, while the battle for The Rock ended with the remaining resistance collapsing.

• The four Chaos Gods prepared to attack The Rock, but a powerful C'tan and the Emperor’s projection confronted them, forcing them to withdraw and order their followers to attack the Imperium.
• Horus urged Perturabo to abandon Chaos, and Sanguinius arrived to appeal to his regrets and offer him a chance to return.
• Perturabo agreed to go to Terra and hear the Emperor’s explanation, then ordered the remaining Iron Warriors Terminators to lower their weapons.
• Vashtorr attempted to escape with the key fragment, but Liang Bing and Luke tried to stop him until Kesha ordered them to let him go in exchange for the Chaos Gods ending their intervention.
• Vashtorr vanished with the key fragment, and the remaining resistance collapsed after Perturabo’s surrender, Abaddon’s death, and the Orks’ destruction.

Lan reported that the Chaos Gods could not be safely confronted in the Warp and detected Inquisitor DOOM alive and fighting there, while Kesha chose to trust him to return on his own. In T'au territory, Darth Vader oversaw Warp-engine upgrades and ordered the T'au to contact Chaos forces as potential allies against the Imperium.

• Lan explained that attacking the Chaos Gods in the Warp would be prohibitively costly and detected an active Hilling Empire signal near a Chaos vortex.
• Luke Skywalker identified the signal as Inquisitor DOOM, and Lan reported that DOOM was fighting alongside a human squad.
• Kesha declined Lan's offer to retrieve DOOM and said the Imperium would trust his judgment and stand ready to support him.
• Darth Vader learned that the T'au had successfully tested a Warp engine prototype, though their ship upgrades remained incomplete.
• Vader judged the T'au too weak to challenge the Imperium directly and ordered them to seek strategic cooperation with powerful Chaos forces.