They walked for a long time without a single alert appearing.
That was the first bad sign.
The landscape around them wasn’t spectacular. No grand ruins. No wandering monsters. Just a rocky expanse, warped in places, as if the ground had been reshaped several times… and then abandoned.
“The System is ignoring us,” Mi-sun murmured.
“No,” Rin replied.
“It’s watching without intervening.”
As they advanced, Rin felt something closing around them. Not a visible barrier. A constraint. His perception of the flows grew harder, as if space itself refused to be read.
He attempted a micro-rewrite. Nothing dramatic. Just a slight shift in density beneath his feet.
The response was immediate.
A dull pain shot through his skull. Brief. Warning.
“…Limitation zone,” he breathed.
Ha-joon lifted his head sharply.
“Here, the probabilities are… rigid.
Favorable outcomes drop sharply.”
Dae-hyun tightened his grip on his shield.
“So we can’t improvise.”
“Exactly,” Rin confirmed.
“And it’s intentional.”
They arrived before a circular depression. An artificial crater, too symmetrical to be natural. Deep marks scarred the inner walls, as if something had tried to claw its way out… or in… over and over.
At the center, the ground was blackened.
Rin stopped.
“It’s here.”
The words had barely left his mouth when the air shifted.
A low vibration rippled across the area. Not a roar. Not yet. More like an answer to something that had just been permitted to respond.
A notification finally appeared.
[Uncharted Zone Detected.]
[Partial Anomaly.]
[Warning: Certain skills may be altered.]
“Convenient,” Mi-sun muttered.
The ground trembled.
Then the shadow passed over them.
Massive. Distorted. Winged.
Ha-joon gasped in pure panic.
“…That’s not a normal creature.”
The roar followed—crushing, visceral. A wave of raw fear swept across the zone. Dae-hyun staggered. Mi-sun felt her hands tremble despite herself.
Rin held his ground.
Not because he wasn’t afraid.
But because he understood the fear.
The Beast revealed itself fully.
A massive lion, its fur bristling with dark armored plates. Draconic wings folded but ready to unfurl. And that tail—long, segmented, ending in a stinger that gleamed with almost living poison.
This time, the System could not remain silent.
[Boss Detected.]
[Mantycore Chimera.]
[Rarity: ★★★☆☆☆☆]
[Status: Boss of the First Floor.]
[Creation of a renowned alchemist of the Demon Kingdom.]
Abilities scrolled too fast to be reassuring.
“No frontal assault,” Rin said immediately.
“Never.”
The Mantycore leapt.
The ground exploded where it landed.
Mi-sun reacted first. She hurled a metal shard toward a cluster of unstable rocks—not at the beast, but at the environment. Using her freshly obtained skill:
Unique Skill — “Collateral Effect”
Type: Environmental Control / Indirect Strategy
Effect: Transforms anything she touches (or destroys) into a trap or consequence for the enemy, even at a distance.
The collapse forced the Chimera to veer aside, claws raking stone instead of flesh.
“Now!” Rin shouted.
Dae-hyun planted his shield—not to block, but to hold position. The fear-roar hit him head-on. He wavered… but remained standing.
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Ha-joon, eyes wide, whispered:
“Three seconds.
After landing… three seconds without aerial attack.”
Rin moved.
He attempted a rewrite—small, surgical. Not on the Chimera. On the air around its wings.
Resistance was immediate. Violent. His vision blurred.
But it worked.
The wings beat… too late.
The Mantycore missed its lift-off, unbalanced for a fraction of a second.
Enough.
Mi-sun triggered a second chain reaction. The ground gave way beneath a rear paw. The beast roared in fury.
“It’s learning!” she shouted.
“We won’t get the same opening twice!”
Rin already knew.
This fight wasn’t meant to be won quickly.
It was meant to punish disorder.
And for the first time since entering the Tower, Rin understood his power wouldn’t be the main key.
Only a lever.
They hadn’t chosen this boss because it was the strongest.
They chose it because it revealed exactly what the Tower expected from them.
As the Chimera rose again, its stinger slicing through the air, Rin knew one thing with certainty:
They would not leave this battle intact.
The Mantycore pivoted violently.
Its tail cut through the air with a sharp whistle.
“Dae-hyun!” Rin shouted.
The stinger struck the shield head-on.
A wet crack resounded. Poison spread across the metal in dark veins, eating into it like living acid. Dae-hyun absorbed the impact, stepped back once, then again.
“It’s… almost piercing through,” he grunted.
“Don’t let it touch your body!” Mi-sun called.
She was already moving.
Her small throwing daggers left her fingers one by one—not at the head or torso, but at joints: wing bases, tail junction, flanks weakened by the earlier collapse.
None aimed for a killing blow.
Each blade was a marker.
The Mantycore roared, more irritated than wounded, and beat its wings violently. The gust hurled Ha-joon to the ground.
“Ha-joon!” Rin shouted.
The boy rolled aside, gasping, then raised his crossbow almost mechanically.
His hands trembled.
Not from fear.
From overload.
“…Now…” he whispered.
He fired.
The bolt did not aim at the Chimera.
It struck a cracked pillar behind it.
The probability of collapse was low. Too low for a “normal” shot.
But Ha-joon wasn’t aiming for normal.
The pillar gave way.
The Mantycore was forced forward—exactly where Mi-sun’s daggers had marked.
“Rin!” she yelled.
He understood.
He rushed in.
His short blade wasn’t meant to pierce such a creature. He knew that. So he didn’t aim for flesh.
He aimed for the moment.
He activated his power.
Not to alter the Chimera.
To tighten the space around it.
A micro-zone of increased resistance. As if the air had thickened, just enough to slow the tail’s motion.
Pain struck instantly.
Blurred vision. Metallic taste in his mouth.
But the stinger missed.
Dae-hyun seized the chance.
He charged, shield first, then struck with his short mace—not to destroy, but to unbalance.
The impact echoed through the crater.
The Mantycore staggered.
One second.
Then it screamed.
The fear-roar exploded.
Ha-joon fell to his knees, unable to breathe. Mi-sun felt her legs weaken. Even Rin nearly faltered.
Dae-hyun stayed.
He trembled.
But he stayed.
“NOT… NOW!” he shouted, voice breaking.
Something happened.
Not new strength.
Resonance.
Through his skill:
Unique Skill — “Reverberation”
Type: Amplification / Memory of Impacts
Effect: Can “record” actions and consequences within a limited field and reproduce them later—not exactly, but altered according to his mental state.
The Mantycore’s movements, its scream, the wave of fear… repeated for an instant—an imperfect echo projected before Dae-hyun.
The Chimera hesitated.
A fraction of confusion.
That was Reverberation.
“NOW!” Rin roared.
Mi-sun threw her last daggers—not to wound, but to close exits.
Ha-joon, tears in his eyes, reloaded and fired again.
The bolt struck the base of the neck, where plates overlapped.
Rin leapt.
His blade sank just deep enough.
Not to kill.
To open.
The Mantycore screamed once more, beat its wings… then collapsed heavily into the crater.
Silence fell.
Brutal.
Unreal.
No one spoke.
Then the System reacted.
[Boss of the First Floor — Eliminated.]
[Hidden Condition Validated.]
[Essence Detected.]
The Chimera’s body cracked, slowly disintegrating, leaving behind a dense, pulsing essence heavy with power.
Rin fell to his knees.
No triumph.
Just exhaustion.
The silence weighed heavier than the battle.
The essence floated before him.
Dense. Unstable.
Not beautiful. Not inviting.
It pulsed slowly, like a foreign heart.
Rin did not touch it immediately.
He had learned.
Every reward had a price.
Every “gift” from the System was a disguised debt.
The air vibrated.
Then the System spoke.
Not to him.
To everyone.
[Hidden Condition — VALIDATED.]
[Total Completion Criteria for Floor 1 Achieved.]
A second later, further announcements layered across the sky, visible far beyond this forgotten zone.
[Access to Floor 2 — UNLOCKED.]
[Eligible Participants: ALL survivors of Floor 1.]
[Note: Individual exploits remain recognized.]
The world seemed to hold its breath.
Rin slowly lifted his head.
He understood immediately.
It wasn’t just their victory.
It wasn’t just a boss defeated.
It was a lock.
A lock no one had known—or wanted—to see.
Because of them, those without wealth, faction, or visible exploit…
could ascend.
Not because they deserved it.
But because someone had accepted paying the cost.
Dae-hyun stood silent, staring at the fading remains of the Chimera.
Ha-joon trembled, drained.
Mi-sun did not smile. She watched Rin, as if measuring what he had truly done.
And in the shadows, far beyond the shattered pillars…
Jin-woo applauded softly.
“…I knew it,” he murmured with a muffled laugh.
“Of course it would end like this.”
He turned away, already ready to leave.
“Always someone to clear the table before dessert.”
Rin didn’t hear him.
He was still looking at the essence.
Then he reached out.
The moment his fingers touched the pulsing mass, the System reacted.
[Essence Detected — Mantycore Chimera.]
[Absorption in Progress.]
Pain came instantly.
Not explosive.
Not brutal.
Something more insidious.
A warmth spreading slowly through his veins, as if his own blood were learning a new language.
[Random attribution of one Mantycore ability.]
[Primary Effect Applied: Strength +30%.]
[Secondary Random Effect: Poisoned Blood / Poison Immunity.]
Rin gritted his teeth.
He felt his body change.
Not stronger.
More… dangerous.
One final notification appeared.
Not loud.
Not imposing.
Almost solemn.
[The Chimera Alchemist is interested in your exploit.]
Then, as if the System stepped back to observe its creation, a final line engraved itself across the interface.
[A legend is being written.]
Rin closed his eyes for a moment.
He did not yet know what kind of legend it would become.
But he already knew one thing:
The tutorial had ended long ago.
And the Tower had finally noticed him.
