Chapter 12: The Forging of the Iron Warriors — Part One
2026-02-27 02:13:59 — Author: One-Meter-Sixty Me
Forrix felt heat pressing behind his eyes. He fought hard to keep his expression controlled.
He thought of the brothers who had died at Incaladion — of those who had fallen at his side mid-charge, still pressing forward in their final moments. Some of them had never even had their names recorded.
The training ground lights seemed dim beneath the Titans' shadows. Twenty-two war machines stood in silence, their silhouettes pressing down on every Iron Warrior's heart like a mountain range.
Forrix had seen Titans before. At Incaladion, the vast majority of their ground forces' losses had been inflicted by Titans — it was only when the Mechanicus forces loyal to the Imperium deployed their own god-machines that the tide had begun to turn.
He had watched Titan god-machines with his own eyes as they ground through defensive lines — a single Volcano Cannon shot flattening an entire ridge, an entire battle line, in an instant.
But those Titans, compared to the ones before him now, were children's toys.
These moved with a fluid elegance absent from any other Titan he had ever seen. None of the heaviness, none of the patchwork quality of standard patterns. Their armour plates fitted with absolute precision. Every joint spoke of engineering exactitude — as if they had not been constructed at all, but grown as a single, unified organism.
Each one was a mobile fortress. A war machine capable of independently destroying an entire city.
Twenty-two of them appearing simultaneously on a battlefield...
Forrix's breathing stopped for a moment.
"Father."
Berossus's voice pulled him back from his thoughts.
Berossus stood at his side. That perpetually quiet face showed open shock for the first time in Forrix's memory. He was looking up at the immense machines with his head tilted back.
"These — are all of these going to be ours?"
He still couldn't quite believe it.
"Yes."
Perturabo's tone was calm. Twenty-two Imperator-class Titans were nothing particularly remarkable to him.
"This is only the beginning. I will establish complete production lines on territories beyond Olympia — to provide you with the finest equipment and weapons, the best vehicles and fleets."
"The next time you take to the field, you will have my most powerful fire support behind you."
His gaze passed over the damaged power armour, the makeshift weapons.
"I will never again send you to charge an enemy line with your bodies. Never again make you pit inferior wargear against enemy heavy artillery. Never again allow you to be treated as expendables after paying the steepest price — labelled 'drudges,' labelled 'corpse-grinders.'"
His voice rolled across the training ground.
"What you will have is the most powerful logistics and fire support in the entire Imperium."
Ten thousand Astartes stood in silence — but it was no longer the uneasy, apprehensive silence of before. This was a different kind of silence: something compressed, something straining toward eruption.
Forrix felt a burning at the back of his eyes.
He lowered his head slightly, not wanting his father or his brothers to see what he was feeling.
Perturabo looked at his sons, and a complex emotion rose inside him.
He knew the history of the original. He knew what the Iron Warriors had endured under the original Perturabo — an extreme distortion, a madness that had consumed itself.
The original had trained them through the most brutal methods, demanded the harshest standards, and treated them with the coldest indifference.
He had not wanted to be that way. But the distortion and the stubborn resentment had taken root in him, and the Fourth Legion's rigid conservatism had caused him pain he didn't know how to express.
That would not happen again. Perturabo swore it to himself. He would forge the Fourth Legion into Iron Warriors who were truly steel — without and within.
A truly powerful army was not built on fear and oppression. It was built on trust and respect.
Discipline remained mandatory. Training would be brutal. Standards would remain demanding.
But he would make these warriors understand why they had to endure it. He would let them see what their efforts were for. He would let them feel that their sacrifices were worth making.
Perturabo looked out at them, then turned and walked toward the twenty-two Titans.
"Iron must be forged. Will must be tempered. I will make you into true Iron Warriors."
"This is only the first step. These Titans, this wargear — it is all yours. As is the fleet I have built over the years. You will receive it shortly."
He walked to the foot of the foremost Titan — the tallest of all, standing one hundred and fifty-two metres. This was the first Imperator-class Titan Perturabo had ever designed, iterated and refined ever since, and today it made its formal appearance.
The Titan seemed to sense something. It lowered its head slightly, then slowly sank to one knee.
These Titans were all operated by Logic Engines. This one's system was always the first Perturabo updated. By now, it could comfortably manage the full operational load of an entire subsector — logistical oversight, battlefield mechanical coordination, and strategic calculation — without strain.
"These Titans have no names. I created them — but I will not be the one leading them across the galaxy."
"I believe that right belongs only to those who will one day command them. That is for you to decide."
"Forrix."
The First Company Captain startled slightly at his name, then stepped forward quickly and dropped to one knee.
"From this day forward, you will continue to serve as the Legion's acting commander. When I am absent, you are responsible for the Legion's daily operations and combat command."
"But remember — I have no need for a machine that only follows orders. I need a commander who thinks independently, adapts to circumstances, and makes the right decisions in the worst possible conditions."
Forrix raised his head. Something complicated and fearful moved behind his eyes.
"Father, I — I fear I may not be... I fear I cannot —"
"What are you afraid of?"
Perturabo's voice carried a brief sharpness.
"Are you afraid you are not qualified? Or afraid that your capabilities will disappoint me and your brothers?"
Forrix fell silent. The Fourth Legion held its breath.
"Do you know why I chose you, Forrix?"
Perturabo stepped toward him. Forrix's considerable height seemed almost childlike before the Primarch.
Forrix lowered his head further.
"No, Father."
"Because I believe in you."
"At Incaladion, when the Eighth Expedition Fleet was nearly annihilated, you dragged the survivors out of the wreckage and kept fighting."
"You faced enemies who outnumbered you many times over. Withering artillery fire. A hopeless situation. And you did not retreat, did not abandon the field, did not surrender."
"That is why I chose you. Not for your seniority. Not for your record. For your will."
"The Iron Warriors need intelligent commanders. But they also need warriors who can keep their spine straight in the very worst of circumstances."
After a moment of silence, Forrix raised his head. His eyes were steady.
"I understand, Father. I will not fail your trust."
Perturabo nodded, then looked toward Berossus.
"Berossus."
The second company's perpetually taciturn captain blinked at the sound of his name, then stepped forward quickly and knelt beside Forrix.
"Father."
"I know you are a man of few words. But I have heard of your tactical ability. I need you to study every campaign, analyse every engagement, extract lessons and conclusions, and refine the Legion's tactical doctrine."
Berossus opened his mouth as if to say something, then simply gave a single firm nod.
"Yes, Father."
Perturabo continued down the list.
One by one, company captains stepped forward, knelt, and received their new appointments. Some were named Quartermasters, responsible for logistics. Some became training instructors. Some took on intelligence and reconnaissance roles. Some were assigned as chief combat engineers.
Ten thousand warriors stood in stillness, watching their captains step forward one by one to receive their father's appointments.
They all understood: from this day forward, nothing would be the same.
When the last captain had received his assignment, Perturabo spoke again.
"From today, the Logic Engine will be integrated into the Legion's training. Whether for day-to-day training and life, or for any support you require during the Great Crusade ahead, it will play an indispensable role."
"This is the second step. It is not only the Logic Engine that will join the Legion — the automata and the Iron Circle as well. The AI Dreadnoughts too. You will need to overcome your psychological resistance. They have an irreplaceable role in the Legion's future operations throughout the Great Crusade."
Perturabo knew there would always be those who could not accept the existence of Abominable Intelligence. The Imperial Truth had taken deep root in them over decades.
But the power of artificial intelligence was self-evident. Used correctly, it would substantially increase the efficiency of the Great Crusade — and keep casualties within an exceptionally low range.
"Beginning now, you will undergo three months of training."
"In those three months, you will learn new tactics, new equipment, new operational concepts — integrated with everything your past experience has taught you."
"The training will be brutal. My standards and expectations are demanding."
His gaze moved across every warrior, and his voice grew heavier.
"You must endure it. Because only by enduring it will you become true Iron Warriors."
Ten thousand warriors were still for a moment, then knelt again as one.
Perturabo nodded.
"Rise. I will be with you throughout these three months. When you return to the Great Crusade, I will follow your campaigns through the Logic Engine."
"But for now — the Iron Warriors need to expand. I will select suitable candidates from the academies of the Olympia system for genetic augmentation."
"The Iron Warriors will be restructured around Grand Companies. Each Grand Company is standardised at ten thousand warriors, with five Great Captaincies beneath it. Terminator deployment, armoured assets, vehicles, and fire support configurations will be allocated internally. Special circumstances may warrant the addition of a sixth Great Captaincy.
"Each Grand Company will be commanded by a Warsmith. The existing company captains will take up the Warsmith rank."
"The Fourth Legion's numbers are currently critically low. I will begin genetic surgery on suitable candidates as quickly as possible to address the shortfall."
"I have studied the Imperium's nineteen-stage genetic augmentation procedure. Drawing on years of research into the Iron Custodians' genetic modification, I have added three new procedures to the existing Astartes augmentation sequence."
"You will undergo a three-day modification process, then return to training."
In truth, what Perturabo referred to was essentially the Primaris procedures that Cawl had developed after the Heresy. Perturabo had no difficulty replicating them.
Which was precisely why he had been able to produce Iron Custodians capable of standing alongside Astartes.
The warriors were taken aback. Three additional procedures on top of the existing sequence — and completed within three days?
How many capabilities had their Father kept from the Imperium?
Throughout the training ground, automata began moving through the Fourth Legion's ranks.
"They will escort you to the augmentation facilities. Once your modifications are complete, training begins immediately."
Perturabo was about to turn and leave, but something caught his attention.
"One more thing."
His gaze swept across the warriors still standing in formation. His voice took on a measured weight.
"You will already have some sense of the Emperor's and the other Primarchs' attitude toward me. This situation may create friction between you and other Legions during the Great Crusade."
"If something like that happens — remember this: you are warriors of the Imperium. You are the protectors of humanity. Your purpose is to protect human beings, not to contest honours."
"Our purpose is to be humanity's thickest wall. We are destined to be Iron Warriors who remain in the shadow, unsung — there will be no final triumph, and no day of rest."
"What I want you to know is this: whatever happens, I will be standing behind you."
"We will never have our moment in the light. But that does not mean we accept being treated unjustly."
"Against enemies, I will prepare the most powerful weapons for you. Against injustice, I will be your heaviest armour."
"This is my oath to you, as your gene-father."
When he finished, he turned and walked out of the training ground with long strides. Stephanie and Andros followed in his wake.
Ten thousand warriors stood in silence, watching his silhouette disappear through the gate. No one spoke. No one moved. They stood like iron-cast sculptures.
Forrix looked at the twenty-two Titans. At the mountains of masterwork power armour and weapons. At the steel vehicles rising from underground. At the Achilles-pattern Dreadnoughts.
A feeling rose inside him unlike anything he had ever felt before.
Not pride. Not excitement. Not the rush of anticipation.
Something deeper.
He turned to face his brothers.
"Brothers."
His voice was quiet, but every word carried clearly to the entire Legion.
"Father has given us new hope. We cannot simply receive it — we must prove ourselves worthy of everything he has invested in us and everything he expects of us."
"Under the name Iron Warriors, we will return to the galaxy. And when we do, we will make every soul in it understand — the Fourth Legion is no longer the Legion of Drudges. We are no longer the Corpse-Grinders. We are Iron Warriors, in truth."
"We will wash away the shame of the past with the blood of our enemies. We will prove our worth with the honour of victory. We will guard humanity's future with wills forged of iron."
"This is our oath."
Every Astartes of the Fourth Legion raised their right fist and pressed it to their breastplate.
"Iron begets strength. Strength begets honour. Honour begets faith. Faith begets iron!"
"We are the Iron Warriors. Steel without and steel within!"
An Iron Circle automaton came to stand beside Forrix. A synthetic voice issued from its vocaliser unit.
"My Lord — it is time for the augmentation procedure."
Its intelligence was not high, but the Abominable Intelligence still triggered an instinctive resistance in Forrix.
He nodded, and began directing the warriors to follow the Iron Circle units toward the augmentation facilities.
Whatever his reservations — the fact that their Father had created these things meant their Father had absolute confidence in them. The Fourth Legion's deference to their gene-father had always been a degree that made every other Legion and Primarch somewhat uneasy.
The surgery room's lighting was cold and harsh. Forrix lay stripped on an inclined surgical table, watching the mechanical arms circle overhead.
This was not his first time undergoing genetic augmentation.
Ninety years ago, he had lain on a table considerably more primitive than this one, and received the nineteen-stage gene-seed implantation that transformed mortals into Astartes. The pain then had nearly torn his consciousness apart — but in the end, he had endured it.
Afterward, step by step: squad sergeant, company captain, and then, unexpectedly, acting commander.
Now he was about to undergo the procedures that would transform him into something beyond even an Astartes.
The surgery room door slid open. An Abominable Intelligence unit entered his field of vision — a cylindrical mechanical construct, hovering above the floor, its central optical lens directed at him.
"Lord Forrix — the augmentation procedure is about to begin. Per Lord Perturabo's directive, you are to be the first warrior of the Fourth Legion to receive the three new additional procedures."
The synthetic voice was flat and entirely devoid of emotion.
Forrix said nothing. He gave a slight nod.
"The three additional procedures will be performed in sequence."
"The first procedure is designated the Magnificat. It will be implanted near the pituitary gland. It will stimulate extraordinary development of bone and muscle. According to Lord Perturabo's calculations, upon completion, your height will increase from your current two point five metres to approximately three metres. Your strength and endurance will improve by more than seventy percent."
Forrix's eyelid twitched.
As a veteran who had fought his way up from the battlefield, he understood precisely what that kind of physical enhancement meant.
He would be able to wield single-handed weapons that had previously required two hands. He could charge in heavier armour. In close-quarters combat, the advantage would be overwhelming.
"The second procedure is designated the Furnace. It will be implanted in the thoracic cavity, between the heart and the lungs. It is a biochemical reaction organ. Upon severe injury or near-death, it will activate automatically, releasing large quantities of hormones and energy, dramatically enhancing combat capability within a short window. Per Lord Perturabo's description, the resulting state is similar to a 'final surge' before death — but with significantly greater controllability, a longer duration, and a substantially higher probability of surviving the battlefield."
A last resort at the point of death. Forrix's mind went immediately to all the brothers he had watched die on battlefields.
If they had possessed this organ, they might have killed a few more enemies in their final moments — eased the pressure on the line by a fraction. They would have died with fewer regrets.
And some of them might have held on long enough for their brothers to reach them. Survival odds would improve substantially — though on a battlefield, those odds were always low.
"The third procedure is designated the Sinew Coil. The coils will be implanted in the primary tendons and joints. They provide explosive force output. These coils are composed of specialised biochemical fibres capable of direct connection to your nervous system, releasing stored energy in an instant when required. This will allow you to operate heavy weapons with far greater efficiency."
Three procedures. Forrix drew a slow breath, feeling the cold surface of the surgical table.
"The procedure will last seventy-two hours. You will remain conscious throughout. This is Lord Perturabo's requirement — all recipients must consciously experience every stage of the procedure, and feel every moment of the body being remade."
Forrix closed his eyes.
He remembered the first time he had undergone augmentation — the surgeons had administered large doses of sedative and analgesic, keeping him in a half-conscious state throughout those long nineteen procedures.
Even so, the bone-deep pain had never left his memory. And each procedure had required a recovery period before the next could begin. By the time the full augmentation sequence was complete, years had passed.
Now he was to remain fully conscious through three new procedures. Seventy-two hours.
"Begin."
His voice was steady.
He watched the Abominable Intelligence's optical lens flicker once. Then the encircling mechanical arms began to move, and the black carapace was stripped away.
His body was opened directly. Muscle tissue was cut across his entire frame. The agony of being dissected and flayed simultaneously drove his brow into a hard furrow.
The Astartes's formidable pain tolerance was essentially useless here. But iron will held the sensation at bay through sheer force.
Then they began to open his skull. Forrix felt his cranial bone being cut cleanly by the surgical instruments — sliced as easily as cutting a block of nutrition paste.
A needle entered the back of his neck, pressing toward the area near the pituitary gland. Forrix felt an icy sting, then the sensation of something foreign being slowly introduced.
It was a strange feeling — not precisely pain, but a sensation of intrusion, of his body being forcibly altered.
He was already very weak.
"Magnificat implantation in progress."
The Abominable Intelligence's voice remained impassive.
"Estimated duration: six hours. You may experience severe headache and deep bone aches during this period. These are normal responses."
Forrix could barely hear the words anymore. The pain was consuming his awareness.
It began in his skull, then spread to his skeleton. The sensation started at the spine and radiated outward like fire along every single bone.
Every bone was burning — being torn apart and reforged by some invisible force. He heard his own skeleton creaking. Muscle fibre tore itself apart, regrew, tore again, and regrew stronger.
Forrix's fingers drove into the metal surface of the surgical table, leaving ten deep furrows.
But his eyes remained open. He kept them fixed on the blinding surgical light above him.
No one could have said whether he was in too much pain to think, or whether the visions were coming — that flickering parade of memories that appears at the threshold of death.
Six hours later, the Magnificat implantation was complete. Forrix was given no time to adjust.
The mechanical arms turned immediately to his chest. The second procedure — the Furnace — began.
This time, the pain was more severe.
His two hearts and three lungs were blood-soaked, still beating, still expanding.
Forrix could feel every incision with perfect clarity. He felt cold air making direct contact with his exposed organs. He felt the unfamiliar organ being placed slowly within him.
Forrix came close to losing consciousness. But he did not.
He clenched his teeth, kept his eyes fixed on the surgical light, on the instruments in the mechanical arms' grips, on the cold optical lens of the Abominable Intelligence.
He could no longer measure how much time was passing. He no longer had the capacity for that.
Time moved, second by second.
The cold synthetic voice came again.
"Second procedure complete. Sinew Coil implantation commencing."
Forrix's eyes were threaded with red. His endurance was approaching its absolute limit.
The mechanical arms moved to his tendons and joints — knees, elbows, shoulders, ankles, wrists. Every major joint was cut open once more. Every major tendon received the implanted biochemical fibre coils.
Forrix felt those coils wrapping around his tendons like serpents, felt them establishing connection with his nervous system, felt them becoming part of his body.
The pain had reached its peak. Forrix did not cry out — he no longer had the strength for it.
His consciousness was becoming diffuse. He was fragile as a guttering flame.
The walkman came for him at last.
He saw the brothers at Incaladion who had fallen at his side mid-charge — those silhouettes still pressing forward in their final moments.
He saw brothers sent forward by the Warmaster, blown apart by artillery, their flesh mingling on the battle line with the flesh of mortal auxiliaries until you could no longer tell them apart.
He saw his Father standing before that extraordinary Imperator-class Titan, reappointing him commander of the Fourth Legion.
Forrix lost consciousness. But he was still alive. Perturabo had dared to complete these procedures in three days because he could guarantee his sons would survive them — at minimum, no son of his would die on a surgical table before the Furnace's first activation.
The augmentation surgeries were monitored continuously by medical robots specifically designed by Perturabo. All ten thousand Astartes underwent the Primaris procedures in sequence.
Forrix and Berossus held out the longest of all. Most of the others lost consciousness shortly after the Furnace implantation. A handful held on through the Sinew Coil implantation, or passed out just as it completed.
The Logic Engine's real-time monitoring reports kept Perturabo informed of every son's status throughout.
The Primaris procedures carried substantial risk. Even though Perturabo had absolute confidence in his ability to ensure every son's survival, the bond woven into the very depths of his genetics kept drawing his attention back to each of them in turn.
He did not leave the augmentation facility for those three days. The Logic Engine fed him continuous readings of every son's vital organs and hormone secretion levels in real time, even through their unconscious states.
Medical robots administered compounds to any Astartes whose condition became critical — enough to keep him alive. But only barely, because the Furnace had to self-activate within their bodies for it to function at its full potential in the years ahead.
The Furnace required a minimum of forty-eight hours to self-activate. The first day was surgery. The remaining two days were spent waiting for each Furnace to successfully trigger.
Forrix was the first to wake.
The blinding surgical light and the Abominable Intelligence's optical lens greeted him again. The cold gleam of instruments on the mechanical arms was difficult to adjust to.
He sat up on the surgical table and took stock of his body.
His eyeline was higher. The table seemed to have gotten smaller. The surgery room ceiling seemed closer. He looked down at his hands — they were a full size larger than before. Thicker fingers. Broader palms. Beneath the skin, larger bones and denser muscle were clearly visible.
He stood. His height had indeed increased — from two point five metres to approximately three. His proportions were unchanged, but every part of him was broader, stronger, more complete.
He closed his fist, and felt a power he had never experienced before moving through him.
A surge of force from deep in his chest radiated outward through his entire body. The Furnace's self-activation had pulled him back from unconsciousness.
Forrix stood in the centre of the surgery room, looking at the mechanical arms, at the Iron Circle unit, at the reflection in the mirror — a face familiar and unfamiliar at once.
"Procedure successful."
The cold voice of the Abominable Intelligence.
"You are now the first warrior of the Fourth Legion to complete all three additional procedures. Lord Perturabo has been monitoring your status throughout."
Forrix said nothing. He nodded.
"My brothers?"
"You are the first to wake. The Furnace can self-activate within forty-eight hours — they will wake soon."
Forrix moved toward the door, but a medical robot stepped into his path.
"My Lord — you still require the black carapace reimplantation and the arming ceremony. Lord Perturabo has made the arrangements."
"Black carapace?"
Forrix looked at his substantially larger frame. Could the black carapace even be implanted now?
"One has been custom-fabricated to your new measurements over these three days. There will be no rejection response."
After the black carapace was perfectly integrated — feeling, as always, indistinguishable from his own skin — Forrix found himself without words.
The fully automated masterwork power armour was fitted to him in under thirty seconds, assembled around him like a production line item.
A somewhat unflattering thought crossed his mind — there was something vaguely undignified about being rapidly produced and fitted like a cheap commodity.
But the perfectly contoured masterwork armour against his body drove that thought away entirely.
On the training ground, Forrix looked out at his brothers — every one of them standing at least two metres sixty, clad in masterwork power armour, equipped more lavishly than the Dark Angels or Space Wolves could boast. A surge of fierce, quiet pride welled inside him, though none of it showed on his face.
No one spoke. But the emotion contained in that silence was deeper, more intense, and more powerful than any words.
Forrix raised his right hand, closed it into a fist, and pressed it to his chest.
"Iron begets strength. Strength begets honour. Honour begets faith. Faith begets iron!"
"We are the Iron Warriors. Steel without and steel within!"