"Well, this is actually pretty interesting..."
Li Ke stared at the flickering dragon fire dancing across his palm. What did this evolution actually amount to?
Honestly, it felt like it had just undergone a cosmetic color swap.
He couldn't even test if the healing properties had increased because he hadn't taken any actual damage, having cleanly erased the colossal titan in a single swift stroke.
The baseline sensory feedback remained entirely unchanged, and that signature, familiar aura of intense life force still radiated from the flames.
Glancing over his shoulder, he noted that the bodies of Mai Shiranui and the others—who had been actively dissolving under the intense cosmic starlight moments prior—were already steadily piecing themselves back together beneath the thick shroud of descending golden motes. Left with no alternative test subjects, he deliberately sliced a small laceration into his own forearm, immediately coating the raw flesh in a layer of the new golden dragon fire.
The golden embers knit his skin back together with remarkable speed. Yet, the raw cellular repair velocity was virtually identical to his previous crimson fire. Even after carefully evaluating the core thermal output, Li Ke failed to isolate a single discernible variance between this new manifestation and his old technique.
Nonetheless, the exact microsecond the energy flared to life, a definitive instinct informed him that his signature magic had successfully leveled up.
He was simply entirely left in the dark regarding the specific attributes that had been upgraded.
But the system level-up was an absolute statistical certainty!
"What a massive headache..."
Li Ke's facial expression instantly soured. If a person secures a major evolutionary upgrade but can't decipher what mechanics actually improved, doesn't that functionally equate to merely unlocking a premium character skin? Granted, a flashing, brilliant gold aesthetic looked incredibly magnificent, but a cosmetic skin didn't grant bonus combat attributes!
Still, Li Ke didn't care enough to dwell on it for long. The evolution of his dragon fire was a secondary concern compared to the far more pressing anomalies of this encounter—specifically, his sudden, inexplicable capability to effortlessly comprehend the linguistic phonetics of these alien bastards, alongside his body's unique ability to directly absorb their offensive output.
Based on his immediate visual assessment, that cosmic starlight attack was an absolute insurmountable barrier for any ordinary resident of this world.
An un-dodgeable, area-of-effect environmental irradiation that systematically turned any biological organism to liquid upon physical contact—who on earth was supposed to tank a mechanic like that?
The universe was practically playing a massive joke on them!
The Demon Slayer Corps would have been completely powerless! Unless they had spent years systematically farming millions of lower-tier vanguard minions, successfully accumulating and absorbing the absolute maximum threshold of World Energy beforehand to act as a buffer shield!
But launching a direct blind challenge against a boss of this tier under normal conditions would invariably yield the exact result that had just befitted Shinobu and Mai—instant cellular dissolution.
These localized Lord-class entities were undeniably terrifying powerhouses!
It was simply a stroke of structural luck that the first female demon had been completely countered by the raw elemental property of his flames, while this second cosmic titan's ultimate area-of-effect nuke had interacted with his biology as nothing more than a free battery recharge, leaving the giant wide open to be broken by a direct dragon-fire counter.
Li Ke scanned the surrounding pitch-black waters. Under the continuous, purifying influence of the cascading golden motes, the dark fluid pools were slowly beginning to 'decay,' breaking down into a repulsive, mundane sludge.
Simultaneously, the massive groves of tentacle-trees rapidly withered into black dust, while the unknown, irregular lifeforms skittering across the distant ridges collapsed into immediate, mass mortality. Their biologies dissolved as if they were being violently eroded by a sudden wave of toxic gas or invisible nuclear fallout.
"Wait... nuclear fallout? Radiation?"
Li Ke froze as the realization hit him. He quickly projected his awareness into his secure storage space. Nestled deep within his travel pack was a modern, high-precision Geiger counter he had retained from his travels, though he hadn't bothered to switch it on during their march.
Reflecting on the violent biological symptoms Shinobu and Mai had just exhibited, their sudden cellular collapse mirrored the exact operational profile of an acute, massive dose of ionizing radiation!
When a biological organism is slammed by a catastrophic wave of high-energy beams or heavy radiation, the sudden, systematic destruction of their cellular DNA prevents the body from maintaining any structural cohesion. With the blueprint destroyed, the cells violently disintegrate, manifesting outwardly as a horrific physical melting process.
And just moments ago, their bodies had been actively 'melting.'
Li Ke's eyes narrowed into sharp, analytical slits.
"The territory surrounding the first prime anomaly was heavily dominated by an immense variety of highly irregular, mutated biologies engineered to violently outcompete and purge the native ecosystem. Meanwhile, the exact moment we breached this second sector, we were slammed by continuous cosmic starlight, and that yellow-robed bastard's offensive kit behaved identically to high-intensity radiation while systematically restructuring the local environment..."
Synthesizing the exact operational profiles of the prime entities he had eliminated thus far, an increasingly chilling realization crystallized within Li Ke's mind.
The primary directive driving these anomalous horrors wasn't the simple, crude slaughter of human populations.
They were actively executing a total terraforming protocol to permanently alter the planet's ecosystem!
To alter the world into a domain tailored exclusively to their own atmospheric and environmental specifications.
Engaging these horrors inside their personalized ecological zones would naturally inflict a staggering, near-insurmountable tactical penalty on any native combatant.
Furthermore, the specific terminology the cosmic anomaly had used to classify them was highly revealing.
The title "Fire-Keeper" was an undeniable, direct reference to Li Ke himself, as his multi-world character sheet contained an explicit utility trait named Fire-Keeper. This system-blessing was the exact mechanism that granted him a fundamental tier of administrative clearance over World Energy.
"Which implies... someone in my traveling convoy is designated as the 'Cleaner of this world'?"
Li Ke's gaze drifted over to inspect Tanjiro and Nezuko. Tanjiro was currently kneeling in a state of high-strung, frantic anxiety, meticulously checking his younger sister's physical parameters. Nezuko remained entirely motionless, her eyelids tightly sealed with absolute zero indication of regaining conscious awareness.
And yet, a monumental, violent surge of raw biological life force was actively erupting from the very core of her physical frame! Though her mind remained locked in a deep coma, her cellular matrix was aggressively digesting and containing the remnants of the exact cosmic starlight radiation the yellow-robed titan had summoned!
"Could it be that the designated Cleaner isn't Tanjiro?"
When the term "World Cleaner" initially processed in his mind, Li Ke had instinctively mapped the role straight onto Tanjiro.
The underlying logic for that deduction was incredibly straightforward: Tanjiro Kamado was the absolute, undisputed protagonist of the Demon Slayer universe!
Granted, his baseline combat talent couldn't strictly match the legendary height of Yoriichi Tsugikuni, yet his genetic framework inherited an immense variety of highly irregular anomalies.
Even with Li Ke's heavily compromised, superficial knowledge of the original plot, modern web novel summaries had informed him that the boy possessed a practically indestructible forehead, a supernatural sense of smell capable of literal emotional telepathy and visual tracking, and the passive ability to communicate with wandering spirits.
Every single one of those traits pointed directly to the classic, unyielding design of a chosen savior.
Yet, analyzing her current biological readings, Nezuko's internal state was explicitly undergoing a process of rapid, high-tier evolutionary metamorphosis.
"Then again, it makes perfect mechanical sense. Traditional demonization systematically strips a human host of their personal agency and moral will. Yet, Nezuko not only preserved her human consciousness intact, she eventually managed to permanently conquer her biological vulnerability to sunlight in the original timeline. If Tanjiro's earlier empirical assessment holds true—that she requires absolute zero physical food or blood, and sustains her energy reserves entirely through resting—then... perhaps her demonic architecture makes her the single most qualified tool to act as the World Cleaner."
At the end of the day, breathing disciplines were merely supplementary martial arts engineered to bridge the massive physical stat-gap separating mortal human flesh from demonic physiology. From a purely practical, weaponized standpoint, nothing could possibly outclass a combat asset that possessed the apex physical attributes of a demon, zero requirement to consume human populations, and absolute immunity to solar radiation.
Furthermore, a cursory look at Nezuko's current cellular acceleration confirmed that she possessed a limitless capacity for continuous evolutionary scaling. Her progression had simply been heavily throttled by an absolute deficit of high-density energy consumption.
But that cosmic starlight...
Was pure, unadulterated radioactive energy.
"This world truly deployed an impressive array of systemic safety protocols to protect itself."
Li Ke could effortlessly map out the intended canonical script the world's consciousness had attempted to run. The irregular anomalies they had crossed paths with earlier appeared to possess zero physical weaknesses on paper, but a hidden counter-mechanic almost certainly existed. Had the native vanguard successfully farmed those minions along the trail, slowly accumulating World Energy buffs from the planet, Nezuko eventually would have crossed thresholds to confront this cosmic titan.
Following the predictable defeat of her mortal companions under the radiation nuke, Nezuko would have successfully absorbed the cosmic starlight to trigger a massive evolutionary awakening. Utilizing her newly acquired transcendent power, she would have obliterated the titan, reinforced her stats once more, and confidently marched forward to dismantle the final multi-tentacled horror.
Of course, the exact chronological sequencing of the boss rooms remained a variable, but Tanjiro and Nezuko's sudden convergence upon this specific valley was an absolute mathematical certainty orchestrated by the direct, metaphysical guidance of the planet.
"Fascinating..."
Li Ke let out a low, amused chuckle. His baseline understanding of a World Will was that it operated as the collective spiritual consensus of an entire planetary ecosystem—functionally comparable to concepts like Gaia or Alaya from other fictional databases, though significantly more abstract and esoteric in its execution.
Nonetheless, he couldn't formulate a flawless empirical theory on the mechanic, simply because his multidimensional travels had only brought him into direct contact with two specific World Wills: the broken consciousness of the 7 Days to Die universe, and the current, embattled mind of this Demon Slayer dimension.
Neither of these planetary intelligences was operating under a stable, baseline state.
The first entity was already a shattered, half-paralyzed casualty on the absolute brink of total structural annihilation by the time he breached its perimeter, while the consciousness of this world was currently locked in a desperate, losing defensive campaign against a continuous extra-dimensional invasion.
Consequently, neither planetary entity could be considered to be operating in a normal state.
"Then again, nothing is set in stone. After all, who says a world can only possess a single designated Cleaner?"
Li Ke drew a deep breath and shifted his focus back to his companions.
Eliminating the cosmic titan had pushed his personal stat growth another step forward, though the explicit system notices reminded him that this explosive surge in performance was strictly locked to the spatial parameters of this world.
Yet, that coveted state of absolute genius intelligence descended upon his consciousness once more. It was a slight pity that the cumulative volume of tactical knowledge and sensory data he had logged during this brief deployment wasn't massive, meaning the net upgrade to his analytical capabilities wasn't as earth-shattering as his previous breakthrough. Even so, various foundational breathing styles and the intricate web of Shiranui-ryu ninja combat techniques Mai had displayed earlier rapidly calculated within his mind, seamlessly transitioning into flawless, permanent masteries.
While Li Ke had processed an immense mountain of tactical variables internally, less than two seconds had actually elapsed in physical reality. Stepping forward with urgent strides, he closed the distance to Mai and the others to evaluate their biological recovery.
"Are any of you still registering internal friction or physical discomfort?"
Li Ke extended his hands, allowing a steady, controlled wave of his newly evolved Golden Dragon Fire to cascade over their bodies. Although the psychological sensation of being engulfed in blazing heat remained mildly taxing to endure, Mai, Shinobu, and Mitsuri all shook their heads in unison.
"I am fine. In fact, my internal systems feel remarkably rejuvenated... even superior to my baseline state before the ambush," Shinobu murmured, staring down at the palm of her hand. She could empirically sense that her biological performance had multiplied significantly!
The deep-seated, chronic cellular degradation caused by her long-term ingestion of Wisteria flower poison—a physiological burden that Li Ke's standard Red Dragon Fire had previously failed to fully purge—had been thoroughly repaired beneath the dense downpour of the golden feedback motes. While this genetic restoration didn't automatically boost her raw physical lifting strength, it permanently removed the structural friction bottlenecking her movements, naturally allowing her to exert her maximum speed with significantly less biological strain.
Standing right beside her, Mitsuri flexed her arms, executing a highly enthusiastic double-bicep pose.
"I feel like my physical output just spiked by an incredible margin!"
A radiant smile painted Mitsuri's face, but as her eyes swept across the vast curtains of shimmering golden motes continuously drifting down from the sky, her vibrant expression rapidly dimmed into a look of profound melancholy.
"But I was so utterly useless back there..."
Her sudden confession caused both Mai and Shinobu to instantly clamp their mouths shut, swallowing whatever words of comfort they had intended to offer. The structural reality of the encounter was simply too glaring to deny.
When confronting a cosmic anomaly of that tier, Li Ke was the singular combat asset capable of remaining upright on the battlefield. The rest of the vanguard had been violently incapacitated within the opening microsecond of the engagement. It should have been a coordinated, high-stakes raid requiring absolute collective cohesion, yet Li Ke had been forced to carry the entire operational load entirely on his own back.
Even though their rational minds understood that the catastrophic failure was entirely due to the enemy possessing an un-dodgeable, conceptual area-of-effect nuke, a powerful surge of bitter, unyielding resentment toward their own weakness flared deep within their hearts!
Not only had they failed to provide a single ounce of tactical utility, they had nearly turned into liquid liabilities right before his eyes!
Li Ke, however, possessed a flawless mechanical understanding of the encounter, and knew it was completely illogical to assign blame to their personal capabilities.
"Don't dwell on it. That bastard simply weaponized an exceptionally broken, irregular offensive methodology," Li Ke offered, struggling slightly to formulate a comforting narrative. From a purely statistical perspective, his baseline physical attributes hadn't completely outclassed the elite Pillars of this world to an astronomical degree; if a dozen seasoned Pillars coordinated a flawless ambush against him under ordinary conditions, there was still a non-zero probability he could end up compromised.
The sole reason he could execute these reality-splitting victories against these extra-dimensional lords was because the planetary consciousness was actively tilting the backend system rules in his favor. Li Ke wasn't blind; the sudden, hyper-precise shifts in the wind velocity when he initiated his wildfire strategy had blatantly defied natural meteorological logic.
Furthermore, whenever he unleashed a massive, stamina-draining ultimate technique, the golden feedback loops instantly fully replenished his biological reserves. This specific mechanical concession allowed him to continuously spam his absolute highest-cost, devastating destructive katas without harboring a single shred of concern for his resource bars.
Take his final execution strike against the titan as an empirical example—compressing and channeling the absolute entirety of his physical, spiritual, and blood energy straight into a single swing. Under standard universal parameters, unleashing a threshold-breaking attack of that caliber would look flashy, but the severe internal pressure hemorrhaging, the immense biological backlash of overclocking his Blood-Qi Mystic Arts, and the cascading system failures would have left him physically paralyzed, requiring at least three to four days of absolute bed rest just to stabilize his vital signs.
But beneath the infinite cleansing downpour of those shimmering golden feedback loops, his broken cellular integrity was violently restored back to operational perfection in a fraction of a microsecond.
As it stood right now, multiplying his baseline destructive capabilities by a factor of ten wouldn't be an understatement at all.
Whenever a high-performance warrior of his caliber is completely unburdened by standard resource management, possessing a massive, continent-cleaving area-of-effect damage output that inherently overflows his targets, the resulting battlefield performance looks completely, utterly unreasonable.
Setting secondary variables aside, that opening macro-play of casually lifting his arm to summon a literal sea of thermodynamic fire was an operation he would never dare to execute inside any other dimensional coordinate!
Pulling a stunt like that under ordinary cosmic laws was a direct one-way ticket to a permanent grave!
"In all honesty, if it weren't for the structural assistance of those golden feedback loops constantly reversing my physical damage and fully keeping my stamina bar locked at maximum capacity, I wouldn't have been able to pull off such an absurd stunt. That final swing required the absolute entirety of my kinetic reserves; had the strike failed to shatter his core, we would have been completely wiped out."
Li Ke offered a warm, reassuring smile as he reached down to gently pull Mitsuri Kanroji back to her feet.
In actual structural reality, the tactical situation wasn't nearly as precarious as he made it sound. His character sheet still carried an immense reserve of World Energy clearance, allowing him to initiate a hard systemic retreat back to his dimensional hub at any given microsecond.
The only real logistical headache of a tactical retreat was that pulling off a post-mortem resurrection for Mai Shiranui and the rest of the girls down the line would be a mildly tedious process.
"There's no need to pacify our egos, Li Ke. We possess enough internal clarity to discern between tactical competence and complete vulnerability," Shinobu Kocho remarked, shaking her head slowly. She had spent significant time mentally preparing herself for the sheer scale of his strength, yet witnessing the empirical disparity layout with such crushing finality remained a massive pill to swallow.
Right at that heavy impasse, Tanjiro—whose internal system had been spiraling into a frantic panic over his sister's unconscious state—abruptly looked up, directing a desperate plea toward Li Ke.
"Um... Lord Li Ke, please look at Nezuko! She—she won't wake up! Her vitals aren't stabilizing into a conscious baseline at all!"
During the initial cosmic salvo, Tanjiro had been slammed by the intense starlight radiation to the absolute brink of cellular death. It was Nezuko who had violently thrown her own biological mass over his frame to act as a physical shield, single-handedly tanking the high-density brunt of the beam to preserve his life.
Yet, even though the subsequent downpour of golden feedback loops had completely sealed her horrific tissue burns, her consciousness remained locked behind an impenetrable wall of comatose static, sending a wave of profound, agonizing brotherly guilt tearing through his chest!
He was supposed to be the older brother! He was supposed to protect her!
"You can stand down, Tanjiro. There's zero reason to stress over her readings. Her biological matrix is currently executing a high-tier evolutionary metamorphosis. To put it bluntly—once she completes this processing cycle, she will likely no longer fall under the definition of a demon."
Li Ke could clearly perceive that the raw biological life force radiating from Nezuko's frame was exceptionally vibrant and pure. When he had initially scrutinized her template earlier along the mountain trail, that distinct, persistent underlying trace of putrid demonic corruption had been completely unavoidable.
But the current reading was entirely different. Had he lacked the explicit historical data confirming her demonic status, his Observation Haki wouldn't even be able to isolate a single discernible variance separating her aura from that of a perfectly normal, healthy human being.
"What...?"
Tanjiro froze in absolute astonishment. A split second later, his hyper-acute nasal receptors sub-consciously twitched, a look of profound, ecstatic euphoria instantly blanketing his face.
"It's true! It's actually true! That foul, metallic scent of demonic blood... it's completely vanished from Nezuko's body!"
Staring down at his sister with pure, tearful joy, he frantically pressed his fingertips against the side of her neck. Feeling the massive, high-velocity vitality surging through her main arterial pathways, the emotional dam nearly shattered right then and there.
Still harboring a tiny lingering layer of protective anxiety, he instinctively scooped her small frame tightly against his chest, feeling the rhythmic, increasingly potent thumping of her heart echo against his own ribs!
"This is..."
Shinobu's brow furrowed into a sharp, contemplative line as she watched the miracle unfold.
"The pair of them are likely specialized tactical assets custom-engineered by the core consciousness of this planet explicitly to counter and purge these extra-dimensional anomalies," Li Ke explained softly.
"Those two specific targets we eliminated... they were highly irregular entities operating outside local parameters, weren't they?"
Shinobu instantly deciphered the underlying mechanical subtext behind Li Ke's statement. She pressed her lips together into a thin, tight line, remaining completely silent.
Her deep-seated, clinical hatred toward Nezuko had historically been rooted in a singular, unyielding axiom: Nezuko was a demon. If the girl had managed to exploit this catastrophic cosmic crisis to successfully purge her curse and return to a pristine human state, it was an undeniable, absolute victory for human civilization.
"I simply find it remarkably difficult to process... that this divine, cleansing golden starlight would choose to radiate its blessings to save the life of a demon."
She clearly recalled a previous briefing delivered by Tengen Uzui, detailing how an Upper Moon demon that had been violently fused with an extra-dimensional anomaly was stripped of its alien corruption upon its defeat by Li Ke, only to instantly revert to its base demonic form and be reduced to ash by the natural morning sun. She had honestly never anticipated witnessing a scenario where the feedback loops would actively optimize a demonic biology instead of purging it.
"Because the underlying demonic curse is fundamentally a mutation born from the native biology of this world. Though it is a foul, parasitic stain upon the population, their structural lineage remains a recognized component of this planet's ecosystem," Li Ke remarked, cutting straight to the absolute root of the universal mechanics.
Except...
"Danna..." Shinobu let out a long, thoroughly defeated sigh.
"What's wrong?"
"The next time you decide to deliver a highly profound, philosophically deep breakdown of cosmic mechanics... could you please refrain from aggressively kneading my rear end? I am genuinely, profoundly disinclined to execute an intimate kissing session in the center of a scorched atomic crater."
Shinobu rubbed the bridge of her nose in absolute exhaustion, completely driven to wit's end by his lack of modesty. This man possessed absolute zero concept of baseline operational etiquette or situational awareness; he had seamlessly slid his heavy hand down to squeeze her backside mid-sentence without a single fraction of hesitation.
"Right. Got it. I'll maintain tighter operational control next time."
Li Ke casually gave her soft cheek another two firm, possessive squeezes before nodding with immense seriousness, indicating that he had officially logged her feedback into his database.
"You really are a piece of work..."
Shinobu could only bring a hand up to shield her blushing face, completely surrendering to his shameless pace.