Baryon Mode — Full Form
Baryon Mode (also translated as Biological Mode in some versions) was Kurama's ultimate trump card.
The mode simulates the nuclear fusion process of the sun, fusing Naruto's chakra with Kurama's to generate a completely new form of energy. In exchange for the immense power it produces in a short time, Kurama's life is rapidly consumed.
The chakra produced in this mode has a unique linking property. Any contact with an opponent burns away their chakra and erodes their body. In the original timeline, this ability drastically shortened Ōtsutsuki Isshiki's lifespan, preventing him from completing his reincarnation in time and ultimately causing his soul to dissipate.
Beyond that, Baryon Mode provides a dramatic boost in strength, speed, and sensory ability, surpassing any form Naruto had previously used—including Six Paths Sage Mode.
It once completely suppressed Isshiki in combat.
It could even directly clash with Isshiki's divine technique—
Daikokuten.
As a transmigrator, Akira had a far simpler definition for Baryon Mode:
It was essentially Kurama's exclusive version of the Eight Gates' Gate of Death.
Visual Characteristics of Baryon ModeGolden fox-like ears rising from Naruto's hair
Dark, inverted eye markings around his eyes
A crimson cloak resembling ceremonial robes
Nine blood-red fox tails, four above and five below, flowing behind him
The new energy created by the fusion not only boosts physical ability but also elevates mental clarity. Naruto enters a state similar to the Zen-like "clear mirror, still water" mindset described in the teachings of the Ninja Creed.
Behind those crimson fox eyes lies an inner calm like a still lake.
In battle, Naruto can perceive opportunities frame by frame, making the most precise and efficient decisions possible.
Even with his arsenal of extraordinary ocular techniques—combined with Hashirama's chakra and Sage power—Akira still regarded Baryon Mode Naruto as a terrifying opponent.
He dared not show the slightest carelessness.
"Come on then, Uchiha Akira!"
Naruto beckoned with one hand.
As if Akira were the challenger.
Akira thought to himself:
So he's treating me like Isshiki.
If Isshiki's combat power was 8000, then Baryon Naruto's would be 10,000.
Of course, battle mechanics and intelligence factors had to be considered separately—but it was still a useful benchmark.
"Fine."
"I'll grant your wish."
Akira's right eye focused sharply.
— Toyomiketsu no Mikoto!
"CLANG!"
Naruto didn't even shift his gaze.
His hands moved instinctively.
In a blur of afterimages, he deflected five Susanoo blades flying at him from five different angles.
"Clang! Clang!"
All five were knocked aside in midair.
His perception and reflexes are insane.
Before the blades even finished falling—
Naruto appeared in front of Akira.
His fist exploded forward like thunder.
What kind of speed is this?!
Akira countered with offense, engaging Naruto in close-quarters combat.
Fists and kicks collided.
Each exchange shook him to the core.
So heavy…
My bones feel like they're about to break.
And that was with Umo-da Flow's defensive barrier slowing the impact.
Even more terrifying—
after just a few collisions, a third of Akira's chakra was already gone.
The loss wasn't immediately noticeable—
but his lifespan had likely been reduced as well.
I can't get dragged into his rhythm.
"CRACK!"
During the exchange, Akira suddenly generated Purple Lightning in his left palm and slashed toward Naruto's face.
"Whoosh!"
Naruto tilted his head slightly.
Then grabbed Akira's wrist.
"CRACK!"
Akira's steel wristwatch shattered instantly.
Before Akira even realized what happened—
Naruto twisted.
"CRACK!"
Akira's entire left hand was torn off.
However—
Akira had long ago trained himself in deep meditation to erase pain perception during battle.
He didn't hesitate.
The moment his hand detached—
his right eye locked onto Naruto's face at point-blank range.
— Toyomiketsu no Mikoto!
A Chibaku Tensei core shot forward.
But—
Naruto raised his left hand.
"CRACK!"
He caught the black sphere.
And crushed it with his bare hand.
Then his fingers formed a stabbing spear—
aiming straight for Akira's right eye socket.
Akira's heart skipped.
He jerked his head aside.
Instead—
his left eye exploded into a splash of blood.
Akira instantly teleported behind Naruto.
Purple Lightning surged again in his right hand.
Naruto didn't even turn.
He simply lowered his head slightly.
One of his crimson tails moved like it had its own consciousness—
"SLASH!"
Akira staggered backward, clutching his throat.
The tail had sliced him like a blade.
Half a second slower…
My head would have been severed.
To stop Naruto from pressing the attack—
Akira's right eye activated again.
— Toyomiketsu no Mikoto!
Rows of Myojin Gates descended from the sky.
"CLANG!"
Naruto's fox tails rose.
All nine wrapped around the gates.
They crushed them midair—
turning the sacred seals into scattered red fragments.
Even Isshiki's divine weapon Daikokuten could be blocked by this form.
So stopping Myojin Gates was inevitable.
Akira touched the wound on his throat, blood pouring down.
Then—
— Umo-da Flow!
Time reversed.
His left hand returned.
His left eye restored.
His throat healed.
His chakra, vitality, lifespan, and ocular power—
all returned to their original state.
Naruto watched the severed hand vanish from his grip.
He glanced sideways at Akira.
"So that's what your right eye really does."
"Before, the smoke always covered the moment perfectly."
"No wonder no matter how we attacked you before…"
"You always looked completely fine."
Akira didn't feel like smiling this time.
In less than thirty seconds—
he had brushed death twice.
Once when his right eye nearly got destroyed.
Once when his head nearly got sliced off.
So this is what a pure stat monster looks like.
When stats reach a certain level—
they become a mechanic of their own.
The Konoha shinobi stared in shock.
"Incredible…!"
"The Hokage's sudden power surge is overwhelming Uchiha Akira!"
"Hahaha!"
"Serves him right!"
"You think Konoha is a place you can run wild in?!"
"Kill him!"
"Avenge our fallen comrades!"
But while everyone was celebrating—
Shikamaru's brow tightened deeply.
Naruto had never mentioned this mode before.
And he only used it when cornered.
The crimson cloak…
looked eerily similar to the Eighth Gate of Death.
I have a bad feeling.
That power probably comes with a terrifying cost.
Madara and Obito watched from afar.
Notably—
Madara was no longer standing casually with his arms folded.
He stood upright.
Serious.
Obito spoke first.
"Even though we saw Baryon Mode once in Akira's future illusion…"
"Seeing it in person is far more terrifying."
Madara nodded.
"In terms of raw explosive taijutsu power…"
"It's slightly inferior to Might Guy's Eight Gates Formation."
"But in every other aspect—"
"It completely surpasses it."
"This is unquestionably Naruto's strongest moment."
Obito shrugged.
"Still useless against my Kamui though."
Madara smirked.
"Everything has its counter."
Obito glanced toward Akira.
"I'm a little worried about him."
"Should we step in?"
Madara carefully observed Akira's subtle expression.
As expected of you.
A faint smile appeared on his lips.
"No need."
"Akira intends to fight Naruto to the end."
Akira's thoughts were known only to himself.
Naruto…
This might be the last time we fight like this.
Because before facing Isshiki—
he had already decided to become the Ten-Tails Jinchūriki.
Naruto might never again stand this close to him.
This kind of battle—
where death lurks with every step—
was what Akira considered true combat.
Looks like I really do carry the blood of the Uchiha.
Before using that technique—
he wanted to enjoy this fight as much as possible.
Akira raised his hand in a beckoning gesture.
"Come."
"Uzumaki Naruto."
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