As the myriad of mechanical units busied themselves, Axion finally gained a deeper, more comprehensive understanding of the crisis gripping Lucius.
According to Imperial archives dating back to the dawn of the Great Crusade, the artificial sun nestled within the core of Lucius had already been burning when the Emperor of Mankind first arrived. Ten millennia ago, the nascent Adeptus Mechanicus had scrutinized this artificial heart with exhaustive devotion. Yet, it was riddled with technological black boxes; they could not even comprehend the origin of the combusting stellar matter fueling its core.
As the long millennia ground on, more and more knowledge was lost to history. The tech-adepts of Lucius fought constantly to study and preserve this artificial sun, upon which the survival of their entire world depended.
However, given the unique nature of the Adeptus Mechanicus, this was doomed to be a descent into deeper ignorance. The Tech-Priests hoarded knowledge like currency, locking away technological secrets. If a crucial magos on a project suffered an untimely demise, all subsequent research would be crippled. Though later generations continued to toil, the accelerating loss of prerequisite technologies forced them to rely on increasingly crude, rudimentary repairs.
When the cybernetic fleet first entered the planet's outer orbit, its array of scanners had immediately diagnosed the true state of this artificial world.
Its stability was not merely poor, its containment fields were on the precipice of catastrophic failure. The core's foundational structural integrity hovered at a meager 37%, while the containment field output had degraded to 44%.
Far more terrifying was the fact that this artificial sun completely lacked an emergency shutdown mechanism. Diagnostic sweeps indicated that this critical system had likely been deliberately dismantled by human hands.
While the detonation of an artificial sun might not inevitably tear open a localized black hole, it would undeniably inflict an apocalyptic catastrophe upon the surrounding systems. Depending on the remaining mass, the destructive shockwave and stellar fallout could propagate across a radius of several light-years.
Worse still, the vast network of manufactorums, bastions, and logistics silos girding the surface of Lucius possessed an immense amount of physical mass to fuel such a cataclysm.
As the mechanical units conducted their meticulous structural analysis, Axion confirmed that this artificial sun was definitely not a product of official Federation architecture. Although select internal components still bore serial numbers and manufacturer stamps from the Age of Technology, those metallic alloys had never been designed to regulate a stellar core.
This was, in all probability, an illicit, bootleg apparatus thrown together in the chaotic wake of the Federation's collapse. It was likely that someone had salvaged a fragmented, incomplete blueprint, and then scoured this sector for matching components, forcibly grafting them together to construct an artificial heart.
During the Federation era, the expanse of the Segmentum Obscurus had served as a primary hub for scientific research, littered with test-bed equipment, prototypes, and experimental fabrications. In fact, Axion itself had been constructed within this very region. Discovering a data-slate containing stellar core schematics and scavenging enough scrap metal to build it was entirely plausible here.
Yet, this artificial core was not only crudely assembled, but it was completely devoid of essential control architectures and stabilizing frameworks. Axion could only classify this state of existence as a suicidal gamble born of profound ignorance.
A standard artificial sun required a highly sophisticated, fully integrated suite of auxiliary systems, including energy-siphoning grids, magnetic containment fields, reaction-throttling matrices, and automated self-maintenance loops.
However, the output of this particular core had been climbing at a glacial yet relentless rate ever since its activation. Its containment fields had never functioned properly from day one. Fortuitously, this escalation was incredibly slow, rising by approximately 1.32‰ per annum. Yet, after more than ten thousand years of continuous operation, its total kinetic output had surged by nearly 20%.
As the reaction rate intensified, the original containment fields deteriorated under the strain. Concurrently, the massive energy-harvesting arrays had been pushed to the absolute brink of maximum capacity, allowing an unbroken torrent of excess thermal energy to bleed out into the planet.
The Magi and Tech-Priests of the Adeptus Mechanicus had completely failed to realize this was a symptom of a systemic meltdown. Instead, they had institutionalized the phenomenon, devising the "Ritual of the Solar Blessing," a ceremony where sacred alloys were roasted in the venting thermal plumes until scorched black on both sides. To the Tech-Priests of Lucius, this was the eternal grace of the Machine God.
To Axion, however, this core was exhibiting the textbook symptoms of a localized supernova vector. Thermal bleed and ionizing radiation were merely waste energies; a properly calibrated artificial core should never leak. The only logical deduction was that the world was sitting on a ticking bomb.
The extraneous mechanisms being dismantled by the hordes of Sapient Machine Automatons represented the sum total of the local Mechanicus's desperate efforts over the past ten millennia.
The tech-adepts had built an astronomical number of factories across the outer crust of Lucius, deliberately doing so to maximize the consumption of the runaway energy bleeding from the accelerating core. To suppress the worsening leaks, they had continually stacked ad-hoc energy-siphoning arrays engineered from disparate tech-doctrinals. Then, they built even more manufactorums to burn off the newly harvested power.
In this manner, the planetary core had survived, caught in a delicate, agonizingly precarious equilibrium that had pulled it back and forth from the brink until the present day.
Yet, as the internal reaction rate climbed higher, the efficiency of the critical containment fields decayed exponentially. The rising energy levels had pushed the containment architecture to the absolute limit of structural failure. This was an existential crisis that could not be solved by simply "consuming more" power.
Furthermore, throughout ten thousand years of blind patching, the local tech-adepts had damaged the core's internal logging systems. Axion could not determine exactly when the structure had been initiated, nor when its automated self-repair systems had failed.
Axion even hypothesized that the emergency dampeners on the containment fields had been deliberately uninstalled by the Adeptus Mechanicus themselves. Such safety dampeners would have naturally throttled the core's efficiency whenever anomalies were detected. Given their track record, the Mechanicus had likely removed this vital safeguard during a boneheaded attempt to remedy a perceived drop in power output, completely lacking the technical common sense to understand its purpose.
To rectify this appalling backlog of critical safety hazards, the fleet intelligence enacted a compulsory override.
The newly deployed external cooling structures executed an immediate, forced depressurization of the artificial core. The overflowing energy was siphoned away with absolute efficiency, suppressing the sun's output to a thoroughly stable, low-yield state.
Swarms of Sapient Machine Automatons systematically stripped away the haphazard patches, jury-rigged wiring, and redundant energy-taps piled on by the Adeptus Mechanicus, unburdening the core's original framework. These scrap materials were instantly consumed by nanite swarms and re-forged to repair the core's internal structural damage.
The failing containment field generators were methodically restored, and the core's geometry was realigned. The misaligned components that had been thrown together during its ancient assembly were completely corrected, bringing the artificial sun under absolute, ironclad containment.
The mismatched control systems were purged, and the archaic Cogitator arrays were upgraded to highly efficient, ancient Federation quantum-computing matrices.
The tangled mess of power conduits that had overgrown the chamber like weeds was re-routed into a streamlined, unified network, completely transforming the subterranean landscape.
The chaotic web of cables that once choked the colossal containment arrays vanished entirely. In its place stood massive, elegant alloy structures of pristine craftsmanship, with all cabling neatly organized and embedded within the armored framing itself. Nanite matrices fused the various alloy support columns into seamless monoliths, erasing all traces of crude rivets and jagged weld-scars.
The containment grid thrummed, casting a bright, tranquil luminescence across the chamber.
The colossal artificial sun flared back to life, yet even at the closest observation platform, not a single watt of excess thermal energy could be felt bleeding into the air. Even when stared at with naked optical sensors, its light no longer caused blindness.
An additional layer of specialized transparent armor had been installed around the core, engineered to absorb the brunt of the stellar radiation while retaining just enough translucency to illuminate the underground underworld.
Standardized harvesting arrays from the Age of Technology replaced the mismatched scrap and bloated junk added by the Mechanicus over the millennia. The conversion efficiency of the core's power output skyrocketed past 98.35%. Compared to its previous, near-apocalyptic state, the planet's energy yield had doubled, locked into an unshakeable stability.
High above, the industrial vessels adjusted their thruster vectors. The mechanical tethers extending down into the core were uncoupled and directly reclaimed by the automated fleet. Although these salvaged materials consisted of the vast quantities of precious ores used by the Mechanicus for their "crude patches" over ten thousand years, Axion had absolutely no intention of returning them to the local priesthood.
As quickly as they had breached the crust, the legions of mechanical units vanished back into the void in the blink of an eye.
"By the Omnissiah..."
Staring at the planetary core, completely transfigured before their eyes, the Magi and Tech-Priests fell into a state of collective, ecstatic mania.
The bloated, dangerous core had been rendered geometric, pure, and comprehensible. The suffocating heat had vanished, replaced by perfectly ordered conduit runs and transparent energy flows. The colossal machineries and alloy pipelines gleamed with a pristine sheen; everything radiated the absolute, mathematical beauty of the Machine.
Only then did the Forge World of Lucius receive a formal transmission from the Iron Men fleet.
"Defective artificial planetary core repairs and baseline optimization completed. Emergency maintenance status concluded. Surplus material harvested as compensation for maintenance costs."
"In accordance with your prior invitation, technological visit will now commence."