[500 P.S = 1 Bonus Chapter]
...
Inside the sealed cage deep within Naruto's subconscious, the massive Nine-Tailed Fox lay sprawled on the ground. Its ears twitched slightly at the sound of Naruto's voice.
Too lazy to open his eyes, the beast lazily moved its mouth.
"What are you doing here again, brat?"
Despite the Kyuubi's gruff words, deep down...
He didn't really mind Naruto's visits.
In fact, in this endless solitude, a bit of conversation was welcome.
Naruto heard the familiar tsundere tone and chuckled.
"Heh... I knew it. You're pretending again, furball."
Kurama snorted.
Naruto stepped closer to the bars, stretching his arms. "I'm here to train a new jutsu. This place is perfect—I can really cut loose."
He ignored the Tailed Beast's reaction and walked a short distance away, preparing to begin his training.
A new jutsu?
Kurama's eyes snapped open, vertical pupils narrowing as old memories surfaced.
Tch. The last time Naruto trained in here, he'd nearly demolished the whole mindscape.
What kind of insane technique is he working on this time?
Now fully alert, Kurama sat up, fixing his gaze on Naruto through the bars, curious and a little wary.
Naruto felt the Nine-Tails' piercing stare and just grinned.
"No need to freak out."
After completing his training with the Rasengan, it was time to take the next step—
Nature Transformation.
In ninjutsu, chakra can be altered by adding elemental properties—Wind, Fire, Lightning, Earth, or Water—enhancing its power and versatility. This process is known as chakra nature transformation.
Most shinobi naturally have one elemental affinity, which they can cultivate more easily than the others. For instance, someone with an affinity for Fire can more quickly learn and master Fire Release techniques.
To be able to perform Fire Release jutsu at all, one must already possess and control the fire nature transformation.
However—
To increase the power of elemental jutsu, you have to go beyond the basics. In the original history, Uchiha Madara's extreme mastery over Fire chakra allowed his B-rank Fire Release techniques to rival S-rank moves in power.
That's the true advantage of refining chakra nature.
In fact, mastering more than one chakra nature is one of the qualifications required to become a jōnin in the Hidden Leaf Village. Most jōnin-level ninja have learned to wield at least two elemental natures.
To determine your chakra nature, you can use something called chakra paper. When infused with chakra, the paper reacts—cutting, crumbling, soaking, burning, or wrinkling—depending on your elemental affinity.
Naruto didn't have chakra paper, but he already knew from prior knowledge that his elemental nature was Wind.
The process of chakra nature transformation training is divided into three main stages:
Refine your chakra's elemental nature.
For Wind, that means releasing chakra so sharp and focused it can cut through a leaf in your hand.
Increase the power and control of the transformation.
The goal: produce enough wind-chakra instantly to slice through something as dense as a waterfall.
Combine the nature transformation with a jutsu.
Specifically, to fuse Wind nature with the Rasengan.
…
Naruto took a deep breath as he recalled everything he knew about Wind chakra and its training methods.
Suddenly—
His mind was flooded with experience and insight.
You've had an epiphany!
You've fully comprehended the secrets of Wind Nature Transformation!
Your connection to Wind has reached its peak.
You are the master of wind—the Wind King!
The very air bends to your will!
In that moment, Naruto felt clarity surge through him. Countless practices and theoretical concepts clicked together in his mind.
He could now visualize how to refine and compress wind-nature chakra, then merge it with the swirling energy of the Rasengan.
You've mastered Wind Nature Transformation!
You've combined it with the Rasengan!
You've created Wind Style: Rasengan!
You've awakened Wind Style: Rasenshuriken!
You've unlocked Wind Style: Super Giant Rasenshuriken!
A powerful storm was brewing within Naruto's hands—
And the Hidden Leaf would never be the same.
"I see…"
Naruto muttered to himself, a wide smile slowly spreading across his face.
Watching from behind the bars, Kurama—the Nine-Tailed Fox—narrowed his eyes. He immediately noticed the grin.
Tch… this little brat.
He could already tell.
Naruto must've come up with something dangerous again.
The next moment—
Whoosh!
A Rasengan formed in Naruto's palm, spinning at high speed and glowing with intense light.
But that wasn't all.
Naruto infused it—seamlessly—with Wind Release chakra nature transformation.
The previously neutral chakra began to change—becoming razor-sharp.
Combined with the Rasengan's violent rotation, the wind-chakra added devastating cutting power.
In an instant—
The Rasengan's power surged dramatically!
Wind Release: Rasengan—complete!
Naruto looked at the glowing sphere of condensed wind in his hand. A spark of joy danced in his eyes.
But—
He didn't stop there.
Because he knew: simply changing the chakra nature was just the first step.
The true path was even harder.
Rasengan, at its core, was a jutsu born purely from shape transformation—a technique that manipulates the form and motion of chakra without applying any elemental nature.
Now, Naruto was attempting the unthinkable:
To push both nature and form transformation to their limits—simultaneously.
His goal?
To compress and reshape the Wind-Style Rasengan into something even more powerful—something truly destructive.
Naruto's gaze locked onto the spiraling orb in his hand.
He clenched his teeth.
His arm tensed, muscles straining and trembling under the pressure.
This was it.
He focused all his strength—
And poured everything he had into molding the chakra.
Suddenly—
BOOM!!
A sharp, explosive sound tore through the air!
Kurama's eyes widened.
What the hell?!
Before the Tailed Beast could react, he saw the orb in Naruto's hand begin to morph—
Its shape transforming from a spinning sphere...
Into a massive, wind-edged shuriken.
Fsshhhhh—!!!
The roaring wind screamed as countless tiny chakra blades spun in a deadly formation.
This—
Was the birth of the Wind Release: Rasenshuriken!
To the untrained eye, it looked like a huge spiraling shuriken. But in truth, it was made of countless microscopic chakra blades, compressed and spinning at incredible speed.
From macro to micro, this technique shredded everything in its path.
A true annihilation jutsu.
In the original records, this very jutsu was classified as S-Rank—on par with legends like the Flying Thunder God Technique, Lightning Blade (Raikiri), and Lightning Release: Kirin.
Right now—
Naruto stood tall, holding the Rasenshuriken as it emitted a piercing, high-pitched hum.
His eyes sparkled with determination and excitement.
He knew.
With this power...
He could finally protect himself—and others.
This jutsu wasn't just a technique.
It was a declaration.
A new Naruto had been born.
He tightened his grip on the Rasenshuriken, wind howling in all directions.
With this—
He could even take on the likes of the Third Hokage, Hiruzen Sarutobi, said to be the strongest in the village at his peak.
"I wouldn't dare fight that head-on…"
Of course—
As the Third Hokage, Hiruzen Sarutobi would likely have had countermeasures against the Wind Style: Rasenshuriken.
But let's set that aside for now.
Let's just talk about the jutsu itself—
The raw destructive power of the Wind Style: Rasenshuriken.
At the very least—
It could undeniably be ranked among the strongest techniques ever created.
Meanwhile, Kurama—the Nine-Tails sealed inside Naruto—watched the boy with narrowed eyes and a look of disbelief.
Right before his eyes, that little brat had just created an S-Rank technique.
And its sheer power... even made him uneasy.
What the hell is going on with this era?
What kind of kid is this?!
To create an S-Rank jutsu on the spot, like it was nothing—
Was this some kind of joke?
Kurama couldn't wrap his head around it.
He may not have studied ninjutsu himself.
He didn't need to.
But over the centuries, he had witnessed countless battles… seen thousands of techniques.
And not once—
Not in all his time—
Had he ever seen anyone just invent an S-Rank jutsu like it was no big deal.
"Tch... you little monster," Kurama muttered under his breath.
This wasn't normal.
This wasn't supposed to be possible.
But somehow, Naruto Uzumaki made it happen—right in front of him.
...
TN:
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