Floor 17 didn't ease him in.
The door opened and the Six Eyes returned the count before he had fully stepped through and he stopped with one foot still in the corridor.
Six hundred and twelve cursed spirits.
And at the far end of the chamber — standing still, watching the entrance, waiting — something that made the six hundred and twelve feel like a crowd gathered to watch rather than a threat in their own right. The floor boss. Eight metres tall, ancient, a cursed spirit so old it had developed a physical form that looked almost architectural — structured and deliberate, built by centuries into something that occupied space the way a monument occupies space.
It hadn't moved. It was just watching him.
The six hundred and twelve were already moving.
Kaito stepped fully into the chamber and let the door close behind him.
"Six hundred and twelve," he said. "Plus whatever that is at the back." He looked at the boss across the packed chamber. "Saving yourself for last. Smart. Won't help."
He raised both hands and let Blue build in his left and Red in his right simultaneously — the opposing forces pulling against each other between his palms, the air between his hands compressing with a tension that made the nearest spirits flinch back instinctively.
He brought his hands together.
Hollow Purple crossed the chamber in a line that went through the dead centre of the incoming mass — a clean corridor of erasure, spirits on both sides thrown outward by the displacement force while the ones directly in the path simply stopped existing. Sixty, seventy removed in one application, the chamber suddenly thinner down the middle.
He walked into the gap before it closed.
---
The six hundred and twelve moved like a coordinated mass — not the organised tactical formations of Floor 13's coordinator, but a cruder and in some ways more difficult intelligence, the collective pressure of hundreds of powerful things all pushing in the same direction simultaneously. There were no gaps in it. No windows. Just continuous incoming force from every angle that the Six Eyes tracked and his body navigated through without stopping.
He punched through a cluster of twelve spirits that had closed his exit on the left — three punches, each one hitting two or three at once, the chain impacts creating a brief opening that he moved through immediately. Blue took the next cluster before they could fill the space. He was already turning before the Blue dispersed, Red charging in his right hand, releasing it into a dense pack on his right that had been angling to cut him off.
The repulsive force hit the pack and the result was spectacular — spirits launched in every direction from the point of impact, the ones behind them hit by the ones in front, a cascading chain of collisions that cleared a ten metre radius instantly.
He moved into the cleared space.
This was the rhythm of Floor 17 — punches to create openings, Blue to clear clusters, Red to break formations, his body moving constantly between applications, never stationary, never giving the six hundred and twelve a moment to establish the surrounding pressure that would have made everything exponentially harder.
Forty minutes in the chamber had thinned to maybe three hundred. His knuckles were singing. The reserves were drawing down at a rate he was monitoring continuously with the part of his mind the Six Eyes kept free for operational awareness.
Then the boss moved.
---
It came from the back of the chamber with a speed that was wrong for its size — eight metres of ancient cursed spirit covering ground with a momentum that made the air ahead of it compress visibly. The remaining spirits parted for it automatically, clearing a path, and Kaito saw it coming across two hundred metres of chamber with four full seconds to prepare.
He used all four of them.
Red built to absolute maximum — not combat charge, not field charge, the full output of this body pushed into a single repulsive force application, the energy coiling between his fingers until the air around his raised hand distorted visibly, the stone floor beneath him cracking slightly from the proximity of the buildup.
The boss crossed the last fifty metres in under a second.
He released it directly into the boss's centre mass at the moment of arrival.
The collision was seismic. The repulsive force and the boss's forward momentum met each other head-on and the result was an explosion of displaced force that blew out in every direction — spirits throughout the chamber thrown off their feet, the stone floor cracking in a spiderweb pattern from the epicentre, Kaito himself sliding backward fifteen metres on the cracked stone before catching his footing.
The boss hit the far wall.
The far wall lost the argument.
A section of it collapsed inward, dark stone falling in chunks, dust filling the chamber in a thick cloud that the Six Eyes cut through without difficulty. He tracked the boss's signature through the dust — still present, still active, damaged but standing, pushing itself off the collapsed wall with the unhurried inevitability of something that had decided it was going to keep existing regardless of his opinion on the matter.
He was already moving toward it.
He reached it while it was still straightening and went in physical — no technique on the strikes, just the body, just force, hitting it in the same spot on its central mass repeatedly and with the specific intention of making that spot a structural problem. Punch one through ten landed in a tight cluster on the left side of the boss's torso. He felt each impact transmit through his arms with a solidity that confirmed damage accumulating.
The boss swung its arm — the tree-trunk limb coming around in a horizontal sweep that would have taken his head off if he had been standing where he had been standing.
He was already under it.
He drove his right fist upward into the underside of the arm with a force that cracked the limb at the joint and left it hanging wrong.
The boss made a sound the Six Eyes registered as the first sound it had made since the fight started.
He grabbed the damaged arm with both hands, planted his feet, and pulled — using the boss's own mass as leverage, rotating, releasing — and threw eight metres of ancient cursed spirit into the chamber floor with enough force to split the stone in a radius of twenty metres.
The crater it left was impressive.
He stood at the edge of it and charged Blue — not fast, deliberately, letting it build to full before releasing it downward into the crater.
The attraction force pulled the boss's own massive density against itself, compressing inward, the energy of the application collapsing the spirit from the inside out.
The boss dispersed.
He stood at the crater's edge breathing in a way that was controlled but genuine.
**⬛ FLOOR 17 — CLEARED**
*612 cursed spirits defeated. Floor boss defeated.*
*Proceeding to Floor 18*
*Time remaining: 36 hours, 44 minutes*
He ate in the rest chamber and kept moving. No sleep. No time.
---
## Floor 18
Seven hundred spirits. The boss at the centre from the start — no patience, no waiting, just standing in the middle of seven hundred cursed spirits with the energy of something that had been informed he was coming and had decided to be ready.
The boss on Floor 18 was different from Seventeen's in every way that mattered. Where Seventeen's boss was physical — massive, direct, a problem of force — this one was technical. It projected a domain-like pressure field in a forty-metre radius around itself, a reality distortion that increased cursed energy density inside the field and made every technique he used within it cost significantly more than it should.
He found this out the hard way.
His first Blue inside the field cost double. He felt the drain immediately — the reserves dropping faster than the technique's output justified — and he pulled back outside the forty-metre boundary before committing further.
He stood outside the field and thought for exactly three seconds.
Then he went in with his hands.
Inside the field, technique costs doubled. Physical force cost exactly nothing additional. He moved through the seven hundred spirits with punches and momentum — grabbing spirits and using their mass to hit other spirits, throws and redirects and chain impacts that turned the density of the chamber into a tool rather than an obstacle. It was messy and it was relentless and by the time he reached the boss the surrounding spirits had been thinned to almost nothing.
The boss watched him arrive with what the Six Eyes registered as genuine attention.
He hit it eleven times before it responded.
The response was enormous — a full discharge of the field's accumulated energy in a single concentrated pulse aimed directly at him. It hit Infinity at the outer boundary and pushed — not through, not quite, but enough that Infinity's automatic compression had to work for it, the technique bending under the force in a way that communicated clearly that this was the strongest single application he had faced.
He felt it in his chest like a bell being struck.
He grabbed the boss by the mass of its upper body before it could recharge. Pulled it forward and off balance. Pressed his palm flat against its central mass at contact range.
Red.
The explosion was contained and therefore catastrophic — the force having nowhere to expand outward, driving inward instead, converting entirely to damage at the point of contact. It blew him backward thirty metres and he hit the chamber wall and came off it immediately, legs absorbing the impact and pushing him back upright before the dust of the discharge had settled.
The boss was gone.
He stood against the wall breathing carefully and assessed the damage — nothing structural, the reverse cursed technique already addressing the impact, but the reserves had taken a hit from the close-range Red that he felt clearly and honestly.
**⬛ FLOOR 18 — CLEARED**
*700 cursed spirits defeated. Floor boss defeated.*
*Proceeding to Floor 19*
*Time remaining: 33 hours, 02 minutes*
---
## Floors 19, 20, 21
The floors blurred at the edges.
Not the fights — the fights were distinct and real and demanded complete presence. But the time between them, the corridors, the rest chambers, the mechanical act of lifting crossbars and pushing through doors — that blurred. He was running on something past energy and past the thing that comes after energy, something more fundamental and less comfortable that had no name he knew but that kept him moving.
Floor 19 — eight hundred spirits and two bosses working in coordination. He took the faster boss first, Blue at precise range, watched it disperse, turned to find the second boss already behind him. He spun and drove his elbow backward into its central mass — a strike that wasn't a technique and wasn't elegant and was entirely effective, the impact cracking the boss's outer shell. Red finished it.
Floor 20 — nine hundred spirits in a chamber so large the Six Eyes took a full second to map it completely. He Hollow Purple'd four times and punched for two hours and used Unlimited Void on the boss when it deployed a technique that made physical approach impossible — a barrier of condensed cursed energy surrounding it that dissolved anything that contacted it. The domain put it in the information flood. The barrier didn't help inside Unlimited Void. Nothing did.
Floor 21 — the floor that made him actually stop.
A thousand spirits. He stood at the entrance and the Six Eyes returned one thousand and the number landed differently from every number before it.
He stood with it for ten seconds.
Then — quietly, to himself, not performing it for anyone: "One thousand."
He exhaled.
"Okay. One thousand."
He went in.
It took four hours. He didn't track the time while it was happening — couldn't afford the bandwidth. He tracked signatures and positions and technique patterns and the continuous state of his reserves and the reverse cursed technique's passive output and the location of every spirit in the chamber simultaneously and there was no space left for anything else.
He punched until his arms burned. He Blue'd until the reserves screamed. He Red'd the boss — a thing with three distinct cursed technique applications that it cycled through rapidly — six times before it went down, each application requiring a different response, his adaptation getting faster with each cycle as the Six Eyes catalogued the pattern.
When the last spirit dispersed he sat down on the chamber floor.
Just sat.
The system let him sit for thirty seconds before it pulsed.
**⬛ FLOOR 21 — CLEARED**
*1000 cursed spirits defeated. Floor boss defeated.*
*Proceeding to Floor 22*
*Time remaining: 24 hours, 17 minutes*
*One floor remains before the Abyss.*
*You know what to do.*
He sat with that for another thirty seconds.
Then he stood up.
---
## Floor 22 — Where Something New Is Born
The door opened and Floor 22 hit the Six Eyes like a physical force.
Eleven hundred spirits. The largest number yet, in the largest chamber yet — a space so vast the torches on the walls were pinpoints of blue light at the edges of his perception. And the boss was visible immediately, not hidden in the mass but standing at the front of it, elevated on a raised platform at the chamber's centre, looking at the entrance with an awareness that was different from every boss above.
It knew he was coming.
It had been waiting.
The boss of Floor 22 was the most powerful thing he had faced in the dungeon so far — he could feel that without measuring it, the Six Eyes registering its cursed energy output as a different category from the bosses above, the kind of presence that changed the quality of the air around it. Its technique became apparent in the first thirty seconds — it could strip the cursed energy from any technique directed at it and redirect that energy into a counterattack, a perfect reversal that made every technique he used against it a direct contribution to its own power.
He found this out when his first Blue came back at him.
Reversed. Full force. Aimed precisely.
Infinity stopped it. But the fact of it — the Blue he had thrown returning to him with the same energy he had put into it — stopped him mid-stride.
He stood in the middle of eleven hundred spirits and looked at the boss on its platform.
The boss looked back.
"You reverse techniques," he said. Not a question. "Everything I throw at you comes back."
The boss's energy pulsed — a confirmation that the Six Eyes read as something close to agreement.
He thought about it.
Around him eleven hundred cursed spirits were pressing inward and he was addressing their forward ranks with punches on autopilot while the part of his mind that mattered worked through the problem of the boss. Technique reversal. Every application he launched at it became its weapon. Blue, Red, Hollow Purple, Unlimited Void — all of it usable against him at his own output level.
Except punches.
He looked at his right fist.
He started moving toward the platform.
He punched through eleven hundred spirits for forty minutes — not quickly, not cleanly, but continuously, the body running on the fundamental stubborn thing that had kept him moving since Floor 16. Spirits fell and more filled the gaps and he kept punching and kept moving and kept getting closer to the platform.
The boss watched him come.
When he reached the platform's base he had taken three hits from redirected technique applications — each one stopped by Infinity but each one communicating clearly that the boss's output was enormous and growing, fed by every technique he had used on the surrounding spirits throughout the floor, all of it absorbed and stored and ready.
He climbed the platform steps physically.
The boss discharged everything at once — every joule of reversed and stored cursed energy released in a single catastrophic output that hit Infinity like a tidal wave hitting a cliff. The barrier held. But he felt it in every part of this body simultaneously, the force transmitting through the compression, the impact driving him to one knee on the platform steps.
He stayed on one knee for two seconds.
He looked up at the boss from below.
He stood up.
His right hand came forward — and something happened that wasn't Blue and wasn't Red and wasn't any technique he had used before. Something that had been building across twenty-two floors of accumulated combat, of continuous output, of this body pushed past its comfortable limits over and over and over until something new had formed in the space between technique and pure will.
He didn't know what it was.
He threw the punch anyway.
His fist connected with the boss's central mass — and the boss stopped.
Not dispersed. Stopped. The reversing technique simply went silent, like a light switched off. The boss stood on its platform and its technique was gone — not blocked, not countered, absent, as though it had never existed.
The boss looked at its own hands.
Kaito looked at his fist.
He hit it with Red.
The boss dispersed.
He stood on the platform in the sudden silence of eleven hundred cleared spirits and looked at his right hand for a long time. The knuckles. The fingers. The hand that had just done something he didn't have a name for yet.
The screen pulsed.
**⬛ FLOOR 22 — CLEARED**
*1100 cursed spirits defeated. Floor boss defeated.*
*Proceeding to Floor 23*
*Time remaining: 19 hours, 44 minutes*
*New ability detected. Classification pending.*
*You will understand it when it matters.*
He read the last line three times.
*You will understand it when it matters.*
He looked at his fist one more time.
Then he looked at the Floor 23 door — the entrance to the Abyss, the last three floors, the final stretch between here and the frozen moment above where everything was waiting.
His reserves were low. His body was carrying twenty-two floors of accumulated weight. His hands had been through things hands weren't designed for.
He had nineteen hours and forty-four minutes.
Three floors.
He descended the platform steps and walked to the door and lifted the crossbar and felt the cold of the metal against his palm and stood there for a moment with his eyes closed.
He thought about the fight. The episode. The slash.
He thought about Sukuna's face — arrogant and certain and completely unaware.
He opened his eyes.
He pushed through the door...