The silence of the Sun-Square was brittle, a glass surface waiting for the first stone to shatter it. Kaito Sato stood amidst the cooling embers of his own impossible survival, watching the confusion ripple through the ranks of the Solar Church.
The guards were not men of science; they were men of protocols. Their eyes darted from their flickering spear-tips to their fleeing Inquisitor, and then to the "Dud" who had somehow survived the wrath of a Goddess. In their world, cause and effect were governed by the System. If a spell hit, the target died. If the target lived, the spell hadn't hit. But they had all seen the violet pillar of plasma descend. They had seen the block disintegrate.
Logic dictates that when the world’s fundamental rules break, the observers freeze. Kaito knew he had exactly twelve seconds before their training overrode their shock.
"He’s still a Level Zero!" one of the captains roared, his voice cracking the stillness. "Mana or no mana, he’s made of meat! Spears! Now!"
Kaito didn't wait for the order to finish. His hand dipped into the heavy canvas pouch tied to his belt—the one the guards had ignored because it didn't hum with enchantments. Inside was a mixture of fine sawdust soaked in a concentrated solution of potassium nitrate, dried until it was volatile. To a mage, it was garbage. To an engineer, it was a low-explosive smoke composition.
He didn't chant. He didn't pray. He simply crushed a small glass vial of sulfuric acid against the mixture and hurled the pouch at the feet of the advancing front line.
The reaction was instantaneous. A violent, hissing chemical combustion erupted, vomiting out a roiling, opaque cloud of grey-white smoke. It wasn't the thin, wispy smoke of a campfire; it was a dense, heavy chemical fog that expanded with unnatural speed, swallowing the dais and the first three rows of the guard.
For the first time since his reincarnation into this strange, digital purgatory, the "System" acknowledged Kaito Sato—or rather, the environment around him.
A translucent blue hologram flickered into existence in the smoke, hovering in the physical space before him. It was a public diagnostic pop-up, a shared environmental broadcast. To a native of Olyndos, it looked like "Divine Runes"—sacred, indecipherable geometry. But to Kaito's Earth-brain, deciphering the shapes, it was cold English syntax reporting a general area warning.
[PUBLIC NOTIFICATION: Environmental Shift Detected in Sector 7]
[Status: Level 1 Smoke Veil actively rendering. Source signature missing.]
[Protocol warning: Attempting to assign loose experience points to nearest user...]
[Rendering augmented volumetric effects...]
Kaito paused, invisible in the fog. He looked at the smoke pouring from his pouch. It was too thick. The chemical ratio of potassium nitrate he had mixed couldn't possibly produce this much volume, and the smoke had an unnatural, perfectly geometric volumetric weight to it.
His engineering mind ground the gears. Input: basic chemical smoke. Output: massive, system-grade magical fog. Why the discrepancy?
He observed the holographic public broadcast again. The system was trying to assign a source to the smoke but failing, yet it was still rendering the effect.
If this pattern holds, he deduced, a working hypothesis forming in his mind, the planetary OS operates on rendering heuristics, not absolute physical simulation. It behaves like a lazy engine performing 'culling' and 'asset-replacement' to save compute.
The Grid wasn't checking the molecular reaction in his hand; it was likely performing a 'Visual Consistency Check.' The moment it detected a drop in visibility over a certain threshold, it had likely categorized it as a "Smoke Spell" effect and auto-filled the physical volume with a pre-rendered asset to maintain the world-state for other Users.
"Level 1 Smoke Veil," Kaito whispered, framing his first working theory. "It's auto-completing reality based on visual assumptions. It's a rendering exploit."
The smoke was more than cover; it was proof. If he could provide the physical "proof" of a miracle, the System would "auto-complete" the rest. He didn't need magic; he just needed to trigger the machine's expectations.
He turned and ran.
Kaito moved with the practiced grace of a man who had spent years navigating the tight, cluttered workshops of the Rust District. He knew the geometry of the Sun-Square. He knew where the exits were, and more importantly, he knew where the "Soul-Barriers" were located.
The Soul-Barrier was the Church’s ultimate security measure—a shimmering curtain of high-frequency energy that ringed the execution grounds. To a mage, the barrier acted like a magnetic filter. It scanned for a mana signature; if the signature wasn't on the "Approved" list, the barrier would instantly feedback the intruder’s own mana into their nervous system, vaporizing them from the inside out.
For a Level 5 Paladin, the barrier was a minor tingle. For a rebel mage, it was a death sentence.
Kaito saw the violet shimmer ahead of him, a wall of humming light blocking the main thoroughfare out of the square. Behind him, he could hear the guards' boots clattering on the stone, their shouts muffled by the chemical fog.
"He’s headed for the South Gate! Activate the kill-pulse!"
The barrier intensified, the hum rising to a bone-shaking drone. The air around the violet curtain turned ozone-sour.
Kaito didn't slow down.
If my theory is correct, he thought, his eyes fixed on the energy wall, I am a ghost in this machine. If the System can't see me, it can't kill me.
This was the "NULL Variable" theory he had been crafting in the dark corners of his mind for months, even before his memories had fully returned. In Olyndos, every living thing was assigned a mana value. Even a blade of grass had a signature of 0.0001. It was the "Signal" that proved you existed within the Grid.
Kaito Sato was 0.00. Exactly. Precisely. Sub-atomically.
He was a "Divide by Zero" error. To the security software of the world, he wasn't a person; he was a missing data point. He was an empty string in a database that required a value.
He hit the violet light at a full sprint.
The world turned purple. For a split second, Kaito felt a strange sensation—not pain, but a slight, static tingle, like the feeling of a limb falling asleep. He felt the cold, high-frequency energy of the barrier reach out, searching for a soul to burn, for a mana-vein to ignite.
The barrier's sensors scanned his body.
If [Mana_Signature] > 0 AND [Permission] = FALSE: Execute [Incinerate].
But the "If" condition failed. The software looked at Kaito and found nothing. There was no mana signature to trigger the logic. The "If" statement bypassed him entirely. The "Kill-Pulse" didn't even activate because, as far as the barrier was concerned, no one had actually walked through it.
Kaito burst through the other side of the light, stumbling onto the cobblestones of the merchant district. He didn't stop to celebrate. He dove into a narrow alleyway, weaving through crates of spice and hanging racks of salted meat.
He was out. He was free. And he was the only man on Olyndos who knew that the "Gods" were just malfunctioning sub-routines.
He kept running until the grand, gleaming white spires of the High Cathedral were hidden behind the soot-stained tenements of the lower city. He only stopped when he reached the edge of the Rust District—a graveyard of ancient, pre-Church machinery where the "Duds" lived in the shadows of rusted gears the size of houses.
Kaito leaned against a corrugated metal wall, his breath coming in ragged gasps. He wiped the blood from his temple, his fingers trembling.
"Status," he whispered.
The blue screen flickered back into view.
[User Profile: NULL]
[Current Environment: The Rust District (Low Signal Area)]
[Active Effects: None]
[System Note: Integrity Scan failing. Source: Divide-by-Zero in Sector 7. Attempting to Patch...]
"You can't patch me," Kaito said, looking up at the metal sky. "You don't even know I'm here."
He looked at his hands. They were stained with the nitrate-sawdust and the soot of the magnesium flash. These were the tools of his new trade. He wasn't going to fight the Church with spells he didn't have. He was going to fight them with the one thing they had forgotten in their ten thousand years of worship.
He was going to fight them with the laws of nature.
"Magic is just science we don't understand yet," Kaito muttered, quoting a man from a world that had died millennia ago. "And I understand the science of this world better than the 'Goddess' who built it."
He pushed off the wall and headed deeper into the Rust District. He knew a place—a derelict clockmaker's shop nestled beneath the remains of a massive, collapsed cooling tower. It was a place where he could disappear, where he could think, and where he could begin to draft his "Black Book."
He needed to translate the entire 21st-century scientific curriculum into the language of "Spells." He needed to turn chemistry into alchemy and physics into divine intervention.
But first, he needed to check on Mia.
The thought of his younger sister sent a spike of genuine fear through his analytical mind. Mia, who was suffering from the "Mana Fever." Mia, whose eyes glowed blue in her sleep while she recited strings of code she couldn't possibly know.
Kaito realized now what the fever was. It wasn't an illness. It was a data-overload. Mia didn't have a 0.00 signature like him; she had something far more dangerous.
She had Root Access.
And the System was trying to melt her brain to reclaim the permissions.
"I’m coming, Mia," Kaito said, his voice hardening. "I’m going to build a firewall for your soul."
As he disappeared into the maze of rusted steel, a Church "Gargoyle"—a high-altitude camera drone disguised as a stone monster—soared overhead. Its lens scanned the streets, tracking the mana-signatures of every citizen below. It logged a Level 3 merchant, a Level 1 beggar, and a Level 2 stray dog.
Kaito Sato wasn't just a person; he was a glitch. He was a native of the Sump who had been gifted—or cursed—with the blueprints of the Universe. And the glitch was about to rewrite the world.