Instant Roar

"What astonishing power..."

"To think that such a small-scale ninjutsu could release enough water to form an entire lake."

"Just to what degree have you compressed your chakra, kid?"

Looking at the forest that had been completely leveled and the massive lake that had appeared out of thin air, even the Devil couldn't help but click her tongue at the power of Yu's ultimate Water Release.

"You've come out again, Devil."

Hearing the voice he hadn't heard in a long time, a smile appeared on Yu's face.

"Hmph, don't try to sweet-talk me."

"I'm still angry about what happened last time."

Faced with Yu's delight, the Devil poured a bucket of cold water on him.

"You're still angry about that..."

Listening to the Devil's feigned cold tone, Yu scratched his head in embarrassment, a look of curiosity then surfacing on his face. "But come to think of it, I really want to see what you look like when you're angry..."

Ever since the Devil within him had awakened, Yu had imagined her appearance more than once.

Judging by her enchanting and seductive voice, the Devil he imagined should be a bombshell with a curvaceous figure, a bust size of at least 36E, and a face so alluring that a single glance would be enough to make anyone lose their soul.

"Hmm? Why do I get the feeling..."

Seeming to sense Yu's thoughts, the Devil's sultry voice turned suspicious. "You seem to be thinking about something rather unhealthy?"

"Ahem... well..."

Coming back to his senses, Yu coughed twice in embarrassment. "I hope you won't be too angry after you see this..."

"Because I'm developing another technique, one even more dangerous than the Hard Vortex Water Blade."

As he spoke, Yu, who had been training, began to take off his kimono jacket, revealing the sleeveless vest underneath.

"You brat... what are you doing now?!"

Seeing this, the Devil was startled, a sense of foreboding welling up in her heart.

"BOOM!!"

Before the Devil could react, a massive burst of chakra exploded from Yu's body.

No, rather than chakra, it was more like a violent explosion of highly compressed ninjutsu.

"Rumble..."

Accompanied by the violently erupting, highly compressed ninjutsu, two incredibly wild hurricanes formed around Yu's arms, instantly shattering all the stones on the surrounding ground.

Finally, they formed a pair of white lightning wings attached to Yu's shoulders and back, looking absolutely magnificent.

"What is this?!"

"Yu! Your physical strength?!"

Seeing the power suddenly erupting from Yu, the Devil's voice trembled in disbelief.

Because she resided within Yu, the Devil could clearly feel that the power surging through him had increased tenfold in an instant.

It was unlike the ninjutsu of the Naruto World, nor was it like the Devil Fruit of the One Piece World; she had never seen such an ability before.

"This abundant power... has it finally been completed?"

"A forbidden technique comparable to the Gate of Death..."

With his back and shoulders wreathed in white lightning, feeling the endless, exponentially growing power within his body, Yu couldn't help but widen his eyes.

At this moment, he had no doubt that a single punch would be enough to pulverize everything in front of him.

"No, that's not right..."

"This level of amplification is still far from the Gate of Death."

However, thinking of the terrifying power Might Guy displayed when opening the Gate of Death in the original story—power that exceeded the Five Kage by dozens or even a hundred times—Yu shook his head, still dissatisfied. "It seems it is far from being finished."

"Are you insane?!"

"Stop it right now!!"

Although she didn't know what new technique Yu had developed, the Devil's voice suddenly shouted anxiously in his ear as she felt the power on his body continue to double and run wild.

"BOOM!!"

But it was too late.

Under the force of the constantly doubling power, the highly compressed ninjutsu on Yu's back and shoulders had yet to stabilize when the swirling white lightning finally detonated, the terrifying force blasting Yu away like a cannonball.

"Thud! Thud!!"

After crashing through two large trees, Yu finally fell to the ground in a sorry state, his entire back covered in shocking wounds.

Yin Healing Wound Destruction!!

But Yu seemed to have been prepared; under the support of his powerful chakra, the wounds on his back began to heal at a speed visible to the naked eye.

This was one of the advanced medical ninjutsu mastered by Yu—before being attacked, one correctly judges the point of impact and rapidly concentrates a specific amount of chakra at that location, allowing the wound to automatically and rapidly recover after being struck.

"As expected, it was a failure..."

"Good thing I was prepared, otherwise I would have nearly kicked the bucket."

After lying on the ground for a full ten minutes, Yu finally fully recovered from the severe injuries on his back.

That dangerous new forbidden jutsu from just now—that's right, it was none other than Shunko from Bleach.

Over the past three months.

Aside from treating injured ninja at the Konoha Medical Corps, Yu had spent all his remaining time in the Hokage's office reading ninjutsu scrolls and training.

He would occasionally ask the Third Hokage for guidance, leading to rapid, leaps-and-bounds progress in his ninjutsu cultivation.

His internal chakra reserves and level were also constantly increasing, which gave Yu the idea to develop a new technique.

The Gate of Death—everyone knew it was a high-level taijutsu in the Naruto World; opening all eight gates could release all the body's limits, also known as the "Gate of Death," granting power dozens or even a hundred times greater than the Five Kage when activated.

Might Guy from the original story had opened the Gate of Death, and the power he unleashed even suppressed and beat Uchiha Madara in his Six Paths form for a time.

However, the price was that the body would rapidly wither and die, and even with Yin-Yang Release to sustain life, one would be left with a lifelong disability.

Meanwhile, Shunko was the ultimate combat technique from Bleach that combined Kido and Hakuda.

The user's back and shoulders would be enveloped in highly compressed Kido, using explosions to unify the Kido with their own limbs for combat.

Once activated, it could generate combat power ten or even dozens of times greater than the user's own, with every movement possessing immense destructive force.

So, Yu pondered—since the Shunko from Bleach could combine Kido and Hakuda, could he also attempt to combine the ninjutsu and taijutsu of the Naruto World to develop a forbidden jutsu that rivaled the Gate of Death but without such massive side effects?

After poring over a vast amount of ninjutsu knowledge, Yu finally succeeded.

Even as a semi-finished product, Shunko was able to increase his physical strength tenfold.

However, judging by the extremely dangerous and unstable form of Shunko at present, it was simply not yet suitable for use in battle.

"It seems that to completely finish this technique... it won't be possible, at least not in the short term..."

Looking at the nearly destroyed forest all around him, his own completely shredded clothes and battered body, and the empty chakra reserves within him, Yu couldn't help but let a wry smile touch his lips.