Chapter Summaries

Cisrain used the Emperor’s apparent blessing to convince Titus and the other Ultramarines to trust him, then sent Titus to Gamma World for a data backup. Meanwhile, Cisrain assessed his Legion’s needs and planned to raise the disaster level so he could recruit specialized warriors himself.

• Cyrus presented the Emperor’s apparent words and radiance, prompting Lorne and Tedes to kneel and swear allegiance while Titus concealed his doubts.
• Cisrain ordered Cyrus to take Titus to Gamma World, where Titus would have his data backed up before returning for missions.
• Cisrain reviewed the Imperium’s growing crises, the Silver-White Armor Legion’s strength of 42,170, and the Megastructure Synapse Condenser’s 79.7% completion.
• Cisrain planned to build specialized Legions from heroic-level seeds and raise the disaster level so he could retrieve recruits without relying on the Emperor.
• Cyrus took Titus, Lorne, and Tedes aboard a ship to Gamma World, where Lorne and Tedes remained excited about their encounter with the Emperor’s representative.

Cyrus's group traveled from a neutron star to Gamma World through a stable, non-Warp Gravity Slingshot and saw the planet's immense computing infrastructure. Meanwhile, the Imperium's Destroyers gathered Chaos-corrupted creatures on Ozrax for disposal, as Tau cargo ships prepared to transport mysterious substances between worlds.

• Cyrus's group crossed several light-years in moments aboard a mining ship, then docked at the Research Station above Gamma World.
• Cyrus showed them Gamma World's transformed world and a battle planet used as a computer, while warning them not to target the ships carrying computing power.
• Destroyers in yellow Power Armor loaded Wasp-men and other Chaos-corrupted creatures from Ozrax into cages, discussing their use of alien and cloned Tau as Warp-tainted material.
• Tau cargo ships circled above Ozrax with ghost pilots and aging Drones, while port control verified their cargo.
• Workers on Ozrax used excavated nuclear matter to build a temporary acceleration device that could connect them to the nearest Gravity Slingshot.

Skaiqi planned to spread Chaos-contaminated cargo across Tau Empire worlds and their allies to cause outbreaks and disrupt their faith. As Gamma World prepared the operation, the Tau Empire redeployed a fleet led by Farsight to destroy it.

• Warp-tainted transports from Ozrax arrived near the Tau Empire, and Idamas registered their cargo without investigating it.
• Idamas reflected on his growing taste for blood as rumors spread that he was a vampire.
• Skaiqi rejected Dao'is as the main distribution hub and ordered contaminated cargo sent directly to Tau worlds, allied planets, and human auxiliary worlds.
• Skaiqi instructed her forces to distribute the cargo widely, declaring the operation was for humanity and Gamma World.
• The Tau Empire redeployed a fleet under Farsight to crush Gamma World.

The Tau Empire discovered that warped creatures and corrupted Tau had infiltrated Dao'Is Sept World and the Wasp-men homeworld. Meanwhile, rescued Tau were returned to their worlds, where some reunited with their families and others were reassigned or taken for questioning.

• Ze'en inspected Dao'Is Sept World and ordered its forces to investigate two ships while anticipating Commander Farsight's fleet.
• Tau investigators boarded one ship and found tortured, mutated Tau and other creatures spreading terror through its cells.
• A Nurgle Rot Fly emerged from the crashed ship on Dao'Is Sept World, where zombie-like creatures and apparently unharmed Tau poured out.
• Wasp-men attacked a clan's Tyranid Hive, killed Wasp-men in their cradles, and spread a hidden plague through the nest.
• Tau officials returned rescued Tau to their homeworlds, reassigned some Fire Warriors, and took others to meet an Ethereal for questioning.

An Ethereal discovered that Chaos-tainted symbols and forbidden information were spreading through the Tau Empire’s communications network, while returning Tau were being manipulated or infected. The information had already been transmitted beyond the Empire by the time the Ethereal ordered the network stopped.

• Engra secretly packaged rescue reports showing Chaos creatures cooperating with the Tau and sent them through his personal account.
• Tau AIs passed anomalous training footage through the communications network, allowing Chaos symbols and forbidden knowledge to spread as mysterious mutations appeared across the Empire.
• A Water Caste diplomat named Phi'los died while trying to speak about a device and Gamma World, prompting an Ethereal to order checks on all Tau who had returned from there.
• The Ethereal and Ze'rida traced abnormal data packets from Engineer Logenzo and found hidden footage containing a dark symbol the Ethereal recognized.
• Ze'rida detected that the symbol had been transmitted beyond the heavens, and the Ethereal learned it was already too late to stop the spread.

An Ethereal and the High Council reviewed evidence that Gamma World had manipulated the Tau Empire and spread reports claiming the Tau were allies of Chaos. Aun'Va ordered caution, the purging of Gamma World, and vigilance against the Imperium of Man, then kept Shadowsun behind to give her something.

• An Ethereal connected attacks on Eastern Fringe home worlds and Chaos outbreaks to Gamma World, then reviewed reports showing its gradual expansion and infiltration of the Tau Empire.
• The Ethereal warned the Supreme that a dark curse had appeared, while High Council members dismissed the Chaos alliance reports as fabricated and proposed sending Commander Farsight's fleet against Gamma World.
• Shadowsun cautioned that the rumors might serve a purpose regardless of whether the Tau knew of them, and reminded the council that Gamma World had captured an Ethereal.
• Aun'Va supported Shadowsun's call for caution and ordered Gamma World purged while directing the Tau to guard against the Imperium of Man.
• After the council dispersed, Aun'Va asked Shadowsun to come with him so he could give her something.

Aun'Va prepared for growing tensions within the Tau Empire while the Imperium received signals claiming the Tau had allied with Chaos. Inquisitor Klius assembled a massive force against the Tau, and Rogue Trader Griss realized the Imperium had concealed the real reason for its renewed campaign.

• Aun'Va made plans for the Tau Empire's future as its factions grew more divided.
• Inquisitor Lorne executed Governor Leons for colluding with the Tau and ordered witnesses to erase their memories of the incident.
• The Griss Rogue Trader Dynasty received a Tau signal about an alliance with Chaos, prompting Tashan to recognize the danger and Lord Griss to seek Inquisitor Klius.
• Iron Hands blocked Griss from entering the command ship, while Red Scorpions, Minotaurs, White Scars, and other Imperial forces gathered for a meeting.
• Griss inferred that the Imperium had recalled its forces because Angron had appeared nearby and the Tau were suspected of joining Chaos.
• Klius's conference table filled with representatives from the Chapters as the Imperium prepared to stamp out the Tau threat.

More than a dozen Chapters and Imperial forces gathered at the Kaladon Conference to plan a campaign against the Tau Empire and Angron, while their rivalries undermined cooperation. Kardan Stronos restored order temporarily, but the force remained divided, and the chapter ended with a warning that someone had already grown wary of their actions.

• The Inquisition purged suspected Tau sympathizers across the Damocles Gulf, prompting fierce resistance and anti-Imperial uprisings on some worlds.
• At the Kaladon Conference, the Chapters rejected the mortal naval admiral’s authority and argued over how to conduct the campaign.
• Kasan Sabius and Sirae Karagon represented the Red Scorpions as the Black Templars dismissed their role and claimed the right to fight the Imperium’s enemies.
• Kardan Stronos silenced the bickering Chapters and warned them that Angron was too dangerous to face recklessly.
• Stronos’s forces prepared to target enemy forces while Imperial agents continued searching Tau territory for Angron’s location.
• A Dark Angels force entered the council chamber, and someone warned that their actions had already drawn suspicion.

The Dark Angels and other Chapters coordinated an Imperial campaign to invade the Tau Empire through Damocles Gulf or Mugulath Bay, while the Tau faced threats on both fronts. Gamma World then entered the Tau restricted zone and demanded access to investigate alleged trade-related losses, threatening war if the Tau resisted.

• The Dark Angels, Iron Hands, White Scars, and Blood Ravens temporarily suppressed the Chapters’ disputes and agreed to cooperate against the Tau Empire.
• Imperial leaders planned to cross Damocles Gulf or Mugulath Bay, with the Red Scorpions and Black Templars tasked with seizing a supply point.
• The Tau Empire repurposed Bork’an’s defensive isolation belt to receive defecting Imperial nobles, weakening its defenses against an Imperial attack.
• Ethreal An’muthas and the Tau at Kosi’ma’en monitored Gamma World after the High Council raised its threat level.
• Commander Ons learned that Gamma World had entered the Tau restricted zone, then received Gamma World’s demand to investigate alleged causes of its losses and its warning that resistance would be treated as provocation.

The Tau Empire faced Gamma World's demand to inspect its worlds, while Skaiqi's fleet prepared to exploit the manufactured Chaos Tau scandal as a pretext for conquest. The Tau's anger at Gamma World deepened their internal divisions as the enemy fleet entered Koboi District.

• Commander Angsi and other Tau leaders condemned Gamma World's inspection demand and concluded that either accepting or refusing it would lead to war.
• Gamma World's provocative messages and accusations fueled resentment among Tau toward humanity, the Water Caste, and alien races within the empire.
• Tau infiltrators reported that they had found extensive evidence of Tau producing Chaos Tau as Gamma World's fleet entered Koboi District.
• Skaiqi revealed that Gamma World had used Thought Seal technology to implant false memories in Tau and judged the Tau Empire vulnerable to internal division.
• Skaiqi dismissed the Tau Empire's resistance and asserted that Gamma World would claim its resources and territory.

Gamma World’s fleet prepared to attack the Tau Empire, whose leaders mobilized allies and fleets to resist while launching a smear campaign linking Gamma World to Chaos. The Tau focused on surviving the coming war and expanding beyond Damocles Gulf, accepting that the conflict would end in one side’s destruction.

• Captain Idamas learned that a xenos fleet had been spotted behind the Gamma World force, while Silver-White Armor warriors readied themselves for battle.
• Silver-White Armor Chapter Master Sigismund resolved that Gamma World’s veterans would act as blades and bear the blame to protect its new generation.
• Tau commanders ordered allies near the Korsi'mai'en sept world and the Tau Empire’s Forge Worlds to prepare a counterattack while they awaited Commander Farsight’s fleet.
• The Tau Empire spread rumors connecting Gamma World to Chaos, staging fake arrests on a gateway planet to influence human scouts and undermine trust between Gamma World and the Imperium of Man.
• The Tau Empire redirected its main effort toward resisting the Imperial fleet and expanding beyond Damocles Gulf, choosing to fight rather than submit.

As Gamma World and the Tau Empire prepared for war, Brown oversaw the completed Megastructure Synapse Condenser and exploited Tech-Priest Vetius’s hidden designs. The story left the Condenser awaiting activation as Brown prepared to use it to uncover more forbidden technology.

• Gamma World's fleet entered the Tau Empire’s forbidden inner territory, while Commander Angsi and Tau forces prepared to meet the invasion.
• Tau Fire Warriors and human auxiliaries on the sentinel world vowed to fight Gamma World and prove their loyalty to the Tau Empire.
• Tech-Priest Vetius gave Titus a Gamma World Bolter and a contract allowing soldiers who died near the main fleet battlefield to return and serve again.
• Brown reviewed research progress and confirmed that the Megastructure Synapse Condenser in Karamat had been completed but remained inactive because of power constraints.
• Brown discovered that Vetius had secretly stored valuable Imperial and Necron technology, copied much of it, and planned to use the Condenser to investigate what remained hidden.

Brown oversaw the first test of the Light Lance, a weapon capable of striking targets across ten light-years, and directed his team to aim it at a Tau homeworld system. As the Synapse Condenser calculated the firing solution and drained power from Gamma World's factories, the Light Lance moved into position, leaving the test shot imminent.

• Karamat completed the Light Lance, a Necron-based weapon that could precisely strike targets within ten light-years.
• Brown rejected testing the weapon on an asteroid and ordered his team to fire at a Tau homeworld system instead.
• Brown's technicians connected the Light Lance to the Megastructure Synapse Condenser and increased its computing power under Vetius's name.
• Activating the Condenser cut power to factories on Gamma World, prompting workers and engineers to curse the scientists.
• The Light Lance's barrel began searching for the optimal firing angle.

Professor Brown’s team used the Megastructure Synapse Condenser to calculate and fire a disguised long-range light lance at a Tau Empire military world. The first attack struck a transit hub, and a second beam lit up the planet’s atmosphere as the Tau tried to understand what had hit them.

• Professor Brown explained that the Megastructure Synapse Condenser could calculate particle trajectories and enable precise attacks across vast distances.
• Professor Brown ordered Xiao Ke to make the light lance’s beam green so Gamma World could frame the Orks.
• Gamma World drew energy from dark matter and fired a test shot, cutting power to factories across Karamat.
• The team fired a sustained second shot, which struck the Tau Empire’s Ikaven Asteroid Belt transit hub and destroyed a ship.
• Tau personnel raised the alarm as a green pillar of light tore through the planet’s atmosphere and filled the sky with glowing plasma.

A long-range lance strike devastated a Tau gateway world, while Tau forces blamed Gamma World and prepared to attack its fleet. The chapter ended with Brown leaving Karamat and Little Kris proposing an even larger weapon to improve the strike’s accuracy.

• Tau researchers detected a precise beam strike from more than twenty light-years away and identified the Dao'Is gateway world as its target.
• Tau security forces raided a Chaos-larvae cult on Dao'Is and found a signal device transmitting information into deep space.
• A lance strike erased a city on Dao'Is, caused widespread destruction, and sent a space station falling from orbit.
• Commander Angsi received reports of a suspected Gamma World strike and orders to destroy Gamma World's fleet, with Commander Farsight's fleet arriving behind it.
• Gamma World detected the Tau fleet's hostile preparations and readied its aircraft for battle.
• On Karamat, Little Kris discussed ways to improve the lance's accuracy, and Brown left him in charge before returning to Ozrax.

Gamma World’s expeditionary force invaded the Tau-held Hive World in the Koboi District while Commander Angsi assessed the attack and the world’s defenses. Idamas’s company entered the hive, hoping to recruit its humans, but Gamma World’s offer depended on who counted as human and whether they accepted humanity.

• Little Ke argued that Gamma World needed more resources for his research and told his staff to keep firing the experimental weapon before submitting a larger reimbursement claim.
• The battlefield AI reported to Commander Angsi that the Imperium of Man had invaded the Koboi District and was trying to seize the Tau fortress world.
• Angsi predicted that occupying the Hive World would burden the invaders with resistance and internal conflict, while his AI questioned whether his stance served the Greater Good.
• Xien rallied human and xenos auxiliaries to fight the arriving Imperium forces, believing the Tau had freed them from life in the hive.
• Idamas led his company into the Hive World, intending to negotiate with its humans and incorporate them into Gamma World if they met its definition of humanity.

Idamas forced Keynes and the lower hive to cooperate with Gamma World, which decided to seize the planet for its two billion people. Meanwhile, the Human Imperium fleet crossed Damocles Gulf, ending with a report that the holy relic had resonated.

• Idamas led more than three hundred enhanced soldiers into the lower hive to secure an agreement with Keynes before Governor Skaiqi arrived.
• Idamas’s soldiers killed the attackers blocking their way, stormed Keynes’s stronghold, and forced him to cooperate.
• Keynes gave Idamas information confirming that the lower hive held a large civilian population, and Idamas sent the population data to headquarters.
• Commander Skaiqi ordered his forces to take the planet, and Gamma World sent reinforcements as the Governor approached.
• The Human Imperium fleet crossed Damocles Gulf through space storms and Warp energies, and someone reported that the holy relic had resonated.

Fugerui guarded Sigismund’s Black Sword while Lieutenant Bernt and the Black Templars joined a fleet battle against the Tau Empire. The Imperium briefly regained aerial superiority, while its forces continued fighting to seize the Tau port planet.

• Fugerui watched over Sigismund’s Black Sword as Lieutenant Bernt and his squad departed aboard a Battle Barge.
• The Black Templars and White Scars confronted the Tau fleet, which shifted into an encirclement formation, and agreed to attack its flanks.
• Gell’s fellow pilots rammed their damaged fighters into Tau vessels, and Gell followed their example after an orbital cannon set his craft ablaze.
• A cruiser’s beam destroyed a cluster of Tau drone vessels, allowing Imperial ships to reclaim aerial superiority.
• An Armageddon Steel Legion soldier charged Kroot mercenaries and detonated the phosphex shells on his armor to buy the Imperial fleet time.

The Imperium’s forces advanced against the retreating Tau, while tensions among the Space Marine Chapters and warnings of danger went unheeded. Commander Shadowsun prepared the Ethereal Phase Ripper, a weapon deployed across the frontier that could devastate both sides as the Tau vowed to deny the Imperium any territory.

• Penal Legion soldiers drew enemy fire, then Lieutenant Bernt and the Black Templars descended from assault boats and attacked the Tau forces.
• A White Scars Space Marine warned that the Tau’s retreat and sparse fleet presence felt wrong, while the Red Scorpions ignored other Chapters and refused to cooperate with the Blood Ravens.
• Chief Librarian Morians sensed danger near a mountain and ordered Anders to warn the Red Scorpions, while the Iron Hands continued relying on battlefield calculations.
• Asterion Moloc dismissed the warnings and urged the Iron Hands to press the attack as the Tau kept retreating deeper into their territory.
• Commander Shadowsun took command from Commander Qingxi and prepared to use the Ethereal Phase Ripper, vowing that the Tau would destroy their own worlds rather than surrender territory.

The Imperium’s Chapters drove the Tau back across several fronts, with the White Scars using hit-and-run tactics to set up Black Templar assaults. As Imperial forces advanced, signs of a hidden Tau plan and growing tensions within the Iron Hands and Blood Ravens raised doubts about the easy victories.

• Commander Shadowsun learned that Imperial augmented warriors had begun massacring xenos across several planets.
• The White Scars harassed and outmaneuvered Tau ships, drawing them away before the Black Templars struck their command positions and crippled their fleet.
• The Red Scorpions swept through the Tau home system while Imperial fleets advanced across two sectors, making victory seem close.
• An Iron Father noticed anomalies in the war database but withheld his report from Kardan Stronos amid Iron Hands political divisions.
• Imperial observers noted that the Tau had not deployed several powerful weapons and that the Warp and electromagnetic storms in Damocles Gulf had unusually quieted.
• Chief Librarian Morians learned the Red Scorpions had injured Anders, then seized a high-ranking Tau warrior and used psychic power to search for answers.