Part I - The First Meeting of Many
The meeting stretched on for hours, as was only fitting—two civilisations that had spent centuries locked in conflict could hardly be expected to move forward as if nothing had ever happened. That, at least, was what Aun'Jash believed at the outset, and no one could blame him for such scepticism. All he had ever known of the Imperium was stagnation and savagery, a resilience so fierce the T'au could barely comprehend it. Even the most stoic and resentful Fire Warrior among his company grudgingly respected the Gue'la: their maddening stubbornness, their refusal to break.
Yet, to Aun'Jash's surprise, these Imperial envoys were not what he expected. They were focused, guided, and—in truth—incredibly shrewd. He watched Anna-Murza Jek, the Consul-Palatina of the High Princess, address him in a tone that was both kind and formal. Xenophobia may have lingered in her eyes, but she kept it firmly in check, her professionalism outweighing any prejudice. Aun'Jash understood; Shadowsun herself had that same fire, banked deep behind her steady gaze.
He looked down at the final concord between the T'au Empire and the Imperium of Man—the first and only official treaty between their peoples. It was astonishing. This wasn't some minor agreement with a distant colony or forsaken Imperial sector; this was a pact, signed by the only authority able to command the entire Imperium. For both races, it was a moment of profound significance. And once again, Aun'Jash found himself deeply intrigued by the High Princess—who was this person who could bring the soul-devouring machine of the Imperium to heel? He wished he could meet her, if only to understand how such a person existed.
"This is the official document of the concord," Jek announced, carefully saving the data and passing the details to Aun'Jash and his Water Caste diplomats.
"The creation of official borders and the cessation of military operations near those borders is accepted," Aun'Jash replied as his aides handed him the relevant documents. "And the recognition of the Imperial worlds now under T'au rule."
He fixed Jek with a steady gaze. There was a pause, then she nodded. "Yes. We recognise the 112 Imperial planets now under the T'au Empire as part of your spheres of expansion. And rightfully under your domain."
Jek's face remained expressionless, betraying nothing of her discomfort at the thought. Still, her faith in her Princess—and the path set before her—was unwavering.
"In addition, the High Princess has granted pardons to all Imperial Guard personnel who defected to the T'au, as well as to all humans now living under the Tau'va," Jek continued, handing over the official proclamation. "They will not be persecuted or executed should they wish to visit their families. Any harm done to them on Imperial soil will be met with the full force of the Princess's law."
Aun'Jash hummed, quietly impressed. "That is generous and wise of your Princess. From what I understand, the Imperium is not known for its mercy toward traitors or apostates," he observed, watching for Jek's reaction. To his surprise, she didn't hesitate.
"We're not," Jek replied firmly. "But the Princess's authority is absolute. And so is her mercy. In her own words: if humanity seeks another race for a better life, the fault lies with us, with the Imperium."
Both Aun'Jash and Shadowsun exchanged a glance of genuine surprise.
"Your Princess is a wise leader," Aun'Jash said, and his voice was filled with unmistakable respect.
Jek offered no further words, only a measured nod as the final clause of the treaty appeared on the table. "And as part of the accord, the T'au Empire will halt the expansion of the Greater Good along the Imperial border, as well as cease any attempts to coerce Imperial worlds at the frontier."
Aun'Jash turned to the Water Caste diplomats, who whispered quietly among themselves before nodding in agreement. The compromise was logical—a foundation for genuine coexistence, and perhaps, in time, a broader future for the Greater Good. Aun'Jash inclined his head and met Jek's gaze. "We shall honour the accords as established," he said firmly.
Jek held his eyes for a long moment, then nodded in return. "Then, as it stands, the Imperium of Man officially recognises this accord with the T'au Empire."
Both rose to their feet, the air thick with the weight of history. For a moment, the two leaders simply regarded one another—then, with deliberate resolve, Aun'Jash extended his hand. Jek hesitated briefly, duty and old suspicion warring on her face, but at last she took his hand in hers. The gesture was simple, yet monumental.
"We hope this accord creates a path for both our races to prosper," Aun'Jash said, sincerity ringing in his voice.
Jek, for her part, felt no hatred—nor did she see the T'au as lesser, not in this moment. Duty was paramount. As they shook hands, she wondered if the T'au would ever truly see humanity differently, or if old perceptions would linger. It hardly mattered now.
"Hopefully, that will be the case. This galaxy already knows enough war and destruction," Jek replied.
"And having less of it is a victory in itself," Aun'Jash agreed, his words quietly hopeful.
Shadowsun drew in a deep, steadying breath, fully aware she was witnessing history in the making. An official treaty—if not yet an alliance—between the T'au and the Imperium. The question hovering in the air, unspoken and heavy: How long would it last? Who would be first to break it? No one dared to answer.
As Jek prepared to take her leave, one of the golden guardians at her side shifted ever so slightly. It was a subtle movement, but it drew Shadowsun's attention—and that of Aun'Jash, whose curiosity had been gnawing at him, echoed in the anxious glances of the Earth Caste. They had all been puzzling over what, exactly, these golden figures were: ancient automatons? Advanced AI? Had the Gue'la managed to salvage some lost technology from their distant, pre-Imperial past and brought it here as a show of strength?
They were close, but also far from the truth. The Custodes Immortalis were more than mere machines, and their presence was both a message and a warning. Aurelia was forging more of them, transferring ancient souls from battered Dreadnoughts into new, resplendent bodies. What had begun as a force of 179 had now grown to over 300.
Aun'Jash couldn't hold back. "Consul-Palatina Jek, if I may ask a question…"
Jek turned, surprised. "Of course, Ethereal Aun'Jash."
"If my understanding is correct, the Imperium forbids reliance on artificial intelligence. So, what exactly are these automatons who accompany you?" he asked.
Jek's confusion was genuine at first—until she realised he was referring to the Princess's guardians, the Emperor's own Custodes, as machines. Some of the Lionsguard exchanged silent, helmeted glances. The Custodes Immortalis themselves remained perfectly still, unreadable.
"I am surprised that the Imperium's laws are so… flexible," Aun'Jash added.
Jek recovered, muttering, "By the throne…" then answered, "They aren't automatons, honourable Aun'Jash."
Shadowsun narrowed her eyes, studying the golden giants. One tilted his head, meeting her gaze with an intensity no machine could mimic. Shadowsun shivered—she had seen such a look before, in the eyes of Ves'ron, the Necron. But this felt different; there was a presence here, a living mind behind the gold.
"They remind me of the Ves'ron," she said quietly. "The Necron, in your tongue. But… not empty. I can sense you thinking—strategising, calculating, preparing. Not as a machine would, but as a warrior."
Neither Custodes reacted, but for Solbe Karax, an ancient Hykanatoi and veteran of the Unification Wars and the Webway, the observation was accurate. He was always preparing—because that was the Custodes way. The other, Debeeran Kalimakon, had once been caged in a Telemon Dreadnought, but Aurelia had given him new life in a body worthy of his soul.
The two communicated wordlessly, via the silent channel all Custodes Immortalis shared. Even as the negotiations concluded, they calculated contingencies. If things turned violent, they estimated it would take between 4.5 and 3 seconds to eliminate every Fire Caste warrior in the room—protecting Jek, above all else. The T'au saw ancient machines; the truth was far stranger and far more dangerous.
"They are…" Jek glanced at Solbe and Debeeran, who each gave the subtlest of nods, granting silent permission. "The Emperor's and Princess's guardians. Ancient warriors," she replied, leaving it intentionally vague. The truth was, even Jek herself knew little of the full nature of the Immortalis Custodes—and perhaps that was for the best.
The Earth Caste, ever curious, immediately theorised. Had the Imperium somehow managed to copy the minds of ancient warriors and upload them into machines? It wasn't so far-fetched, given their own experiences with Crisis Suits—perhaps the Imperials had simply taken the concept further, creating unique personalities for each automaton. A form of AI, yes, but one with just enough individuality to skirt its own laws.
Of course, they were completely mistaken. And the Custodes Immortalis had no intention of clarifying the truth for their xenos counterparts.
"Is this a creation of the Princess?" Aun'Jash asked. Jek nodded.
"Yes," she confirmed.
Aun'Jash hummed thoughtfully as the Earth Caste scribbled notes—clearly intrigued by the possibilities. The Princess of the Gue'la, it seemed, was far more innovative than they had realised.
"If I may ask, Consul, is there any chance of an audience with the Princess herself?" Aun'Jash inquired. Jek's answer was ready, as if she had anticipated the question.
"At present, the Princess has not discussed direct contact, nor has she indicated plans for a meeting," Jek replied smoothly. "However, as stated in the accord, the designated common world will serve as neutral ground for both our peoples to establish a direct diplomatic link in the future."
Aun'Jash glanced at the Water Caste, seeing them accept the Consul's words with quiet pragmatism. It was the most they could hope for at this stage, and there was no benefit in pressing for more—not yet.
"Understood, Consul," Aun'Jash responded, his tone diplomatic as he reviewed the newly minted accord. It was, he had to admit, an excellent beginning.
Jek, too, regarded the treaty and silently agreed. This was a rational, necessary compromise—one that would give the Imperium some much-needed breathing room on this front, allowing attention to shift toward more imminent dangers. The treaty put a pause, at least for now, on the T'au's incremental encroachment. Jek knew the T'au would always hunger to spread their Greater Good, but they would have to accept that the Imperium would stand firm.
For now, both sides could turn their focus to the true perils lurking in the galaxy—threats that haunted the Imperium and, because of the state of affairs, also troubled the T'au as well.
Far from the boundaries of material reality, Aurelia stood alone within the hallowed halls of her Basilica—her own private realm—gazing into the shimmering pool that mapped the galaxy's fate. She watched the ripples of the newly forged treaty between the Imperium and the T'au, content that it brought her people a much-needed reprieve. In truth, a war with the T'au would have been nothing but a futile squandering of lives and resources, a distraction from far greater threats. Aurelia's perspective was shaped by long exile and hard-won wisdom. Millennia ago, during the Great Crusade, she had accepted the extermination of xenos as natural, even necessary. Humanity, she believed, had always been the hunted, always defending itself.
Now, she could see how naïve—how blindly cruel—that view had been. There were monsters among the xenos, true, horrors like the Rangdan that threatened all sapient life. But there were also those whose only crime was to exist—entire species erased simply for being other.
Her hand drifted across the vision pool, tracing the faint blue glow of the T'au Empire, its fragile constellation of worlds. How many civilisations, she wondered, might have reached such heights had they not been trampled by the Imperium's relentless march?
Aurelia gave a soft, rueful chuckle. She genuinely wished for a future without more unnecessary bloodshed—a future where another xeno race might become an ally, if only for a time.
She also understood, with a wry sense of inevitability, that the T'au would soon face challenges they had never anticipated. The Gue'vesa—the humans living under the Greater Good—were unpredictable, not because Aurelia would send saboteurs or stir rebellion, but simply because she knew human nature too well.
"I do wish for them to find peace. I truly do," Aurelia murmured, her fingers swirling just above the image of T'au, the heart of their empire. "But I hope you Ethereals are ready for the questions your humans will start to ask."
She could already hear them, echoing across a thousand worlds: What if the God-Emperor truly returns? What if the Holy Princess can save the Imperium? Did I choose wrong? Is there hope for the Imperium? The doubts and longings of humanity would not be silenced by borders or decrees. Some would crave only peace, eager to forget the old empire. But Aurelia knew—humans were rarely content with peace, and history had taught her that the most dangerous questions were always the ones whispered in the quiet after the storm.
Aurelia exhaled softly, her thoughts heavy with concern. She genuinely wished that the humans living under T'au rule would find peace, but she could not help but worry for them. Once conflict faded and the threat of war was gone, she knew how easily old faiths could reassert themselves. The Emperor's cult had deep roots—roots that would not be easily pulled up, no matter how long those humans had lived among the T'au. And now, with her own proclamation of pardon, with the assurance that they could return to visit loved ones in the Imperium without fear, confusion and longing would flourish. Some would cling even more fiercely to the faith of the Emperor—some would even begin to venerate her as well.
But others, Aurelia feared, would turn to a new faith, building cults around the Greater Good. And that, more than anything, unsettled her. The T'au might not yet be on the radar of the Chaos Gods, but that did not mean they were beyond their reach. Especially not with the likes of Tzeentch or Khorne waiting for the first crack in the dam of certainty.
"How will you face that truth?" Aurelia whispered, rising from the edge of the vision pool. "How will you explain to your people that gods not only exist… but that they are hungry?"
She turned away, her form beginning to fade from the basilica's spectral light. Soon, she would face Farsight and try to make him listen—if, indeed, he would listen at all.
Part II - The Praetorian's lingering shadows
Dorn stood amidst the cluttered layers of notes, meticulously organised data-slates, and the ever-present hush of his command chamber. The silence pressed in around him, matching the void that echoed through his mind. He should have been reviewing the latest schematics for the Phalanx's reconstruction, or strategising the next steps for the Imperial Fists, or drafting improvements for Terra's planetary defences and the Sol System's ever-watchful defence circles. There was so much he ought to be doing, but a single, persistent thought refused to release its grip on him—the memory of his recent conversation with the Emperor upon the Golden Throne.
It had been the first time Dorn had truly spoken to the Emperor since his return—a conversation marked by questions long held in silence, regrets never voiced, and confessions that tasted of old wounds. Dorn was not a man to seek pity or dwell on the past, nor would he ever burden the Emperor with tales of half-truths or excuses. He did not seek his father's approval, only clarity—a truth to anchor him, a path to follow.
In that audience, Dorn realised there was no sense in yearning for what could never return. The past was lost: gone with Sanguinius and Ferrus Manus, scattered like Malcador's ashes, vanished like the Emperor's golden dreams. Whatever humanity had been, it was as unreachable as the stars beyond the void.
All that remained was duty—unyielding, absolute. All that remained was his sister, Aurelia, and the fragile hope she carried for a new Imperium, poised on the edge of collapse. Duty, and the faint, stubborn spark of hope—these were all that kept him moving forward.
Still, he was Rogal Dorn—the Praetorian of Terra, the unyielding defender of the Sol System. He would not rest until he saw the future he once fought for, the future the Emperor had dreamed of. And if there was anyone who could bring them closer to that vision, Dorn allowed himself to believe, it was Aurelia.
A sharp knock broke his reverie. Dorn looked to his Huscarls and gave a curt nod; the doors swung open to admit Gregor Dessian, Chapter Master of the Imperial Fists. Dessian entered in gleaming new battle plate—the upgraded Indomitus Terminator Armour. Dorn had always found the original Indomitus pattern lacking, stripped of the Cataphractii's resilience and the Tartaros's agility for the sake of standardisation and expediency. But Mars had redeemed itself of late, thanks in no small part to the STCs pouring from Aurelia's personal archives and circulating through the Forge Worlds.
This new Indomitus pattern was everything Dorn could have wished for: advanced, robust, and no longer forced to sacrifice protection for mobility. Its integrated energy shield and anti-gravitational systems allowed for rapid manoeuvres without compromising defence. For the first time, Dorn felt the pattern was truly worthy of a new age—a suit of armour fit for the Imperium's finest.
"My lord," Dessian greeted, saluting by striking his chestplate.
"Chapter Master," Dorn replied.
"I have brought the reports. All companies are fully equipped and prepared for deployment," Dessian said with pride, handing Dorn a data-slate.
Dorn accepted it, his gaze flicking to the glowing schematic of the Phalanx. "Good. The Phalanx should enter its final stage of reconstruction soon. Once it's complete, we can begin to plan for what comes next."
As a galactic hololith bloomed before them, the Great Rift yawned across the map—a wound that refused to heal. But Dorn's attention was fixed elsewhere, already calculating, always looking ahead.
Dorn's gaze lingered on Cadia—not as the ruined, forsaken world it had become, but as the symbol it once was: the gate that held the tides of Chaos at bay, now shattered and wide open, a wound festering at the heart of the Imperium. He could sense something monumental taking shape upon its broken surface, some new edifice rising from the ashes, claimed by the Warp and whatever force now sought to dominate it.
His eyes swept across the surrounding systems—Clausten, Sabena, and countless others. Some had already been lost, swallowed by the Great Rift, while others still endured, held steady by Aurelia's light and intervention. Dorn's strategy was simple and relentless: forge a defensive ring around Cadia, fortifying system by system with bastions, minefields, supply lines, and overlapping fields of fire. But it was clear he wasn't the only architect at work on this chessboard.
"We have received intelligence of significant troop movements massing near Cadia," Dorn announced, his tone heavy with purpose.
Gregor Dessian straightened as Dorn met his gaze, granting leave to speak his mind. "My lord, the reports out of the Gate are chaos. The devastation has left the region in disarray. Should we focus on whatever is gathering there? Or should we be pouring our strength into the Segmentum Solar's outer defences?"
"Normally, I would agree with caution," Dorn replied. "But these are not the usual threats. This is not the mindless, devouring horror of the Warp. The forces mustering near Cadia are Iron Warriors—Perturabo's own, gathering in force."
Gregor's expression darkened, a chill settling in the room as Dorn expanded the hololithic map. "Perturabo is planning something. I will not grant him free rein."
Dorn didn't need confirmation; the iron logic of Perturabo was written into the warp-tainted soil itself. If his brother was assembling his legion here, it was not for a simple assault. Perturabo was patient, cunning, and relentless—a builder of nightmares.
Dorn's eyes flicked to Agripinaa. It was the lynchpin. If it fell, the sector's defence would shatter. Hydraphur, too, had weathered countless storms and was perilously close to isolation. But even beyond those worlds, Dorn understood—the key was not just the planets themselves, but the constellation of systems around them. If the enemy took Agripinaa, the entire region would collapse, opening a backdoor to Terra itself.
"That cannot happen," Dorn declared. "We cannot allow Agripinaa to fall, nor can Hydraphur be left isolated."
Gregor straightened, ready for the orders to come. "What are your commands, my lord?"
"We'll redeploy Imperial assets to these sectors and begin immediate reconstruction of defensive structures. I want three successor chapters to form a cordon around Agripinaa—full strength, with overlapping patrols and rapid response units," Dorn commanded, his tone brooking no dissent. "Establish continuous contact with every system in the region. No world goes silent without a response."
He turned his attention to the hololithic display, eyes narrowing on Fleet Secundus. "I'll notify the Lord Commander; we'll need additional forces redirected to this front. Fleet Secundus departed early to intercept what we believed would be the bulk of Abaddon's forces, but the Black Legion never struck. That means their plans have shifted. Abaddon is patient—he's waiting, or he's found another path."
Dorn felt the weight of Aurelia's light, a beacon that held the darkness at bay, granting them this precious window to prepare. But he knew better than to rely on miracles. If they grew complacent, if they depended too much on her, they would invite disaster—the enemy would tear through that light the moment weakness showed.
"I will not give them the chance," Dorn said quietly, steel in his voice. "We fortify, we prepare, and we hold. No matter what comes."