Thanks to Brother Danzo for the Ninjutsu

It was already late at night in Konoha.

The last traces of dim moonlight were hidden by the clouds, and nearly all the lights had gone out. Only one lamp still shone brightly through the night.

Paulownia leaves rustled in the night breeze. A Root ninja codenamed "Owl" concealed himself among the branches, watching the lit window in the distance.

Through the gaps in the study blinds, he could see the brat named Hyuga Yunchuan bent over his desk, writing. The diary's cover reflected the warm light of the desk lamp.

According to the intelligence, he had kept up the habit of writing a diary for many years.

"Meow."

A faint cat's cry mixed with the chirping insects. Owl frowned vigilantly and followed the sound, only to see two black shapes bobbing up and down, two cats meowing enthusiastically.

"..."

Owl silently looked away, unable to stop himself from complaining inwardly that he had gone mad. The target was just a child.

Though he thought that, Kamaitachi's miserable armless state involuntarily surfaced in his mind, sending a chill through his heart.

He absolutely could not underestimate anyone. He did not want to end up like that.

Just then, he saw Hyuga Yunchuan suddenly stop writing. He looked at the clock, rubbed his reddened eye sockets, clipped the fountain pen into the diary's leather clasp, then rose and left the study.

Click.

As the bedroom door shut softly, the light went out as well, plunging the entire residence into darkness.

Owl made no move and remained quietly hidden among the trees.

Only after he heard clear snoring from afar did he finally lower the hand he had formed into a seal to use a sensory Ninjutsu. Like a leaf blown down by the wind, he silently used Shunshin to appear outside the window.

The open window gave a faint creak. Owl slipped silently into the study, first storing the diary in a Scroll before quietly searching the room.

Unlike Kamaitachi, he did not attempt to assassinate Hyuga Yunchuan. Finding nothing unusual in the study, he ultimately intended to take only the diary.

After restoring everything to its original state, just as he was about to climb out the window—

"Who's there?!"

A furious shout suddenly rang in his ears, and Owl's pupils shrank instantly.

Before he could react, a piercing rush of wind came from behind him, like a demon shrieking in the gale.

Wind Release: Great Sickle Weasel Technique.

Screech!

Owl only had time to dodge to the side with all his strength. A crescent-moon Wind Blade swept past his side, blood splattering across the wall in an uneven half-arc as a bloody line slowly spread and lengthened along his arm.

Splurt!

Blood erupted as though breaking through a dam, and his arm fell from the shoulder, smashing against the floor.

Owl let out a muffled groan, his body trembling slightly. Without bothering to retrieve the severed arm, he leapt out the window without hesitation.

But he did not see that after he left—

In the distance, the black cat mounted atop a calico cat froze. Its white eye stared in the direction Owl had fled, then it raised a paw and slapped away the stupid companion trying to climb on top of it.

"If you want to take something, you have to leave something behind."

Inside the bedroom, Hyuga Yunchuan lowered his hands from their seal. A faint smile played on his face as he quietly awaited the system prompt.

At the same time, Owl, clutching his arm, quickly arrived at a mountainside. After opening a hidden mechanism, he stepped into the dense, heavy shadows.

As he ventured deeper underground, water stains and moss gradually spread through the dark corners, wrapping him in warm, damp air. Yet rather than feeling suffocated, he felt the security of returning home.

"That guy's strength really isn't simple. No wonder Kamaitachi fell into his hands."

Looking at the stump that continued to gush blood, Owl gritted his teeth, both terrified and furious.

Within the vast, empty enclosed space underground, the lighting was as bright as daylight.

There was even a laboratory with a huge observation window, through which figures in white lab coats and masks could be seen bustling about.

Rows of glass refrigeration units displayed all kinds of materials, countless unidentified reagents, and culture dishes containing cell tissue.

Nearby were more glass containers filled with transparent green liquid, soaking strange plant specimens, as well as specimens of animal torsos and bloody organs such as eyeballs and kidneys.

On the other side of the observation window, Shimura Danzō stood expressionlessly. His narrow left eye was filled with deep darkness as he stared fixedly at the busy workers before him.

No, it would be more accurate to say that he was staring at the object on the experiment table.

It was a thumb-sized piece of white flesh, cell tissue from the First Hokage.

But soon, one of the researchers turned around and gently shook his head at the man.

Shimura Danzō's expression darkened. Raising a hand, he touched his bandaged arm.

"You're all useless. Without Orochimaru, can't you accomplish anything?" Feeling the increasingly intense erosion of the Hashirama Cells, he cursed in a low voice.

Danzō's arm had once been severely injured in battle. Thus, in the eyes of others, including Sarutobi Hiruzen, the way he normally kept his arm bound up was an injury left behind by that battle. They did not know that the arm was no longer his own.

Even Danzō did not know where this arm had come from. That bastard Orochimaru had kept silent even with him, saying only that it was a byproduct of his Wood Release cultivation experiments.

Naturally, power-hungry Danzō chose to transplant it, using up his entire stockpile of Sharingan. Yet what he had never expected was that the Hashirama Cells' erosive nature would far exceed his expectations.

In just a few years, the Hashirama Cells had gradually eroded the arm. Even now, they still could not understand how Orochimaru had made the arm capable of bearing Hashirama Cells.

No one else could do it at all. They had only discovered that Sharingan could suppress them.

But if this continued, the Sharingan he currently possessed would no longer be enough to suppress the Hashirama Cells.

Damn it! Shimura Danzō cursed inwardly. If Kinoe hadn't been taken by Sarutobi, perhaps I could have sent him to seize Hatake Kakashi's Sharingan.

Just as he was considering where to obtain more Sharingan—

Masked Owl appeared at his side, holding the Scroll in his hand. He knelt beside Danzō on one knee and said in a trembling voice, "Lord Danzo."

Catching that intense stench of blood, Shimura Danzō's expression stiffened. He frowned at Owl's arm.

"Why is it an arm again?"

Shimura Danzō's face twitched faintly. Having suffered an arm injury himself, he felt as though he were being targeted. But he quickly shook off that absurd thought, took the Scroll, and waved his hand.

Owl hurriedly withdrew to treat his wound, while Danzō opened the Scroll and lowered his gaze to skim through it.

The reason he had someone bring back Hyuga Yunchuan's diary was to gain a detailed understanding of this "waste" from the Hyuga Clan and determine whether he was worth recruiting.

The diary's contents were mostly trivial daily matters. Shimura Danzō read quickly, gradually forming an image of the boy in his mind.

A child who had once been cowardly and worthless, but after his father was driven to death by their own clan, had begun to thirst for power.

A thirst for power was good.

He feared only that the other party might be one of those people with no desires or ambitions.

Danzō soon came across Hyuga Yunchuan's "thoughts" written for Sarutobi Hiruzen. His reaction was nothing but disdain, with even a trace of bitterness and envy.

That hypocrite Sarutobi did not deserve such praise at all.

Only the part of those "thoughts" concerning "roots" made Shimura Danzō linger briefly.

But when he turned to the next page, his hand suddenly stopped. He stared fixedly at a sentence in the diary, and his expression shifted slightly.

[...Perhaps my heart is like a tree. The more it longs for the light above, the deeper its roots must reach downward, into the soil, into the depths of darkness.]

At the same time, inside Hyuga Yunchuan's bedroom.

The system prompt sounded in Hyuga Yunchuan's mind as expected.

[Ding! Your lie has been judged as [Glib Words], and Shimura Danzō has experienced an emotional fluctuation, reaching the degree of [Kindred Spirit]. Obtained 400 Reality Points.]

"Who serious writes a diary?" Hyuga Yunchuan smiled and silently thought, Manifest Ninjutsu—Lightning Release Armor.

[Spend 1000 Reality Points. Manifest?]

"Yes."

[1000 Reality Points deducted. Remaining Reality Points: 10593.]

Very good. There was still a ways to go before ten thousand. Thanks for the points, Lord Danzo.

Hyuga Yunchuan lay back down and slowly closed his eyes as memories of the Lightning Release Armor began flooding into his mind.

But as he closed his eyes, another question that he had been pondering resurfaced in his mind.

"Since I can manifest Ninjutsu..."

"Does that mean I can also manifest abilities from other worlds?"

However, Hyuga Yunchuan had already tried directly manifesting abilities from worlds different from the Ninja World. It definitely would not work.

The system's manifestation was based on the rules and logic of the world he inhabited. It seemed incapable of creating another power system out of thin air beyond Chakra.

But Hyuga Yunchuan had always had a guess.

"What if I imitate and create abilities from other worlds using the Ninja World's existing foundations of soul, body, Natural Energy, and Chakra?"

Without a doubt, if he could truly create something from nothing, if he could truly shatter everyone's worldview and make them believe in the existence of this unfamiliar power—

Then the Reality Points he could gain would be no small amount.

In fact, his arrangement involving Orochimaru was meant to test this very guess.

For example, since that old Six Paths bastard could create the Pure Land, could he also use lies and points to create a Ninja World version of Hueco Mundo?

Hueco Mundo was a product of another world, Shinigami. It lay in the gap between the human world and the Soul Society, a spatial domain inhabited by Hollows. Hollows were evil spirits and Vengeful Spirits formed after death, capable of gaining great strength by devouring their own kind.

Through the methods of Grafting and substitution, Hyuga Yunchuan wanted to graft his fabricated Hueco Mundo onto the truly existing Pure Land.

Pure lies were not believable.

Three parts falsehood, seven parts truth—that was how you fooled people.

After all, sooner or later, he would have to clash with that old Six Paths bastard. It would be even better if he could seize part of the other party's authority.

However, perfecting this plan would require the help of the esteemed Lord Orochimaru.

With the guidance of that Scroll, Orochimaru—who already possessed profound accomplishments in the field of souls—would surely be able to devise a self-consistent set of theories and logic.

Then Hyuga Yunchuan would be able to turn those theories and logic into "rules" that truly existed in reality.

Like the Sage of Six Paths, he would become an existence that possessed an independent small world and controlled countless powerful souls.

I realized the Boruto Era is seriously ridiculous. That Uchiha Shin was said to have an extremely special constitution that would not reject any tissue transplanted into his body. Therefore, Orochimaru transplanted many Sharingan into Shin that Shimura Danzō had collected during the Uchiha clan massacre. Later, he gave Shin's right arm, already implanted with all those Sharingan, to Danzō as his new right arm.

But damn it, that is complete nonsense. Uchiha Itachi became an Anbu squad captain at thirteen, and only then massacred his whole clan. By then, Orochimaru had already defected years earlier, while Danzō's appearance with the Sharingan-covered arm wrapped in bandages had existed ever since Orochimaru's defection.

I can only borrow the setting a little and try to make it reasonable. Seriously, the contradictions between the anime, manga, and Data Book are already enough to make my scalp go numb. Now there's also the Boruto Era. I can't just avoid writing it, either, since so much of its content is connected to the earlier Naruto plot.