Naruto: Naruto Hosted by the System

After listening to the system's explanation, Sasuke realized the seriousness of the situation.

But then the scene of that night, in which every single member of the Uchiha clan, including the elderly, children, and ordinary people, was killed, flashed before his eyes again.

"Don't underestimate me, I've seen hell with my own eyes."

Sasuke said no more and silently lay down on the operating table.

Upon seeing this, the system also began preparing for the surgery.

The reason for explaining this to Sasuke beforehand was to increase the success rate of the surgery.

Given the system's control, the surgery is unlikely to go wrong, so the main thing is whether Sasuke can pull through.

"It's about to begin, get ready."

Sasuke nodded expressionlessly.

Next, the system attached tubes and needles from various instruments to Sasuke's body, and then injected the pre-prepared first-generation cell culture medium into Sasuke's body through the instrument.

"what!"

As soon as the First Hokage's cells entered Sasuke's body, they began to wreak havoc, causing Sasuke to scream in agony despite his prior preparations.

"Hold on, use your eye power to fight him," the system reminded her as it operated.

Sasuke was reminded of the scene of his parents' murder. He gritted his teeth, and the power of his Sharingan began a fierce battle with the First Hokage's cells.

The First Hokage's cells and the Sharingan's power seemed to treat Sasuke's body as a battlefield, devouring and transforming each other within it.

At that moment, Sasuke's heart pounded like thunder, and his body became swollen.

Gradually, green buds began to appear on Sasuke's body, making him look like a monster that was half tree and half human.

The system remained unmoved, because it knew this was an essential part of the surgery.

The first generation of cells was incredibly powerful, and the chakra contained within them was even more formidable.

Of all the people Naruto knows, only Obito Uchiha and Danzo Shimura successfully transplanted the Sharingan, and both of them achieved a balance with the power of the First Hokage's cells by relying on the power of the Sharingan's eye.

Even when Danzo Shimura fought Naruto, he used Izanagi too many times, almost completely depleting the Sharingan's power. As a result, the balance was broken, and the First Hokage's cells went berserk in his body, turning his entire right arm into a tree.

This is because the surgery that Shimura Danzo underwent was too crude. Judging from his white right arm, the way he transplanted the first generation of cells was most likely by replacing his right arm.

The surgery the system is going to perform on Sasuke will certainly not leave such a risk. As long as the surgery is successful, there will be no more risk of it going out of control.

Danzo Shimura achieved a balance between his eye power and the First Hokage's cells by accumulating a large number of Sharingan eyes, but Sasuke didn't need to go through such trouble, since his eyes were Mangekyou Sharingan.

As expected, under the influence of the pupil's power, the green sprout gradually withered and then disappeared completely.

As things stand, it seems that the Sharingan's eye power has the upper hand.

After gradually adapting to the First Hokage's cells, Sasuke's eye power was clearly replenished, his chakra became more abundant, and his Sharingan, which had long since transformed into a kaleidoscope shape, shimmered with an eerie light.

"Ok?"

The system that was monitoring Sasuke's condition suddenly detected something amiss.

[Host, I need to report something to you. There have been some unexpected issues with Sasuke Uchiha's surgery.]

"An accident? What kind of accident?" Naruto was confused, even though Sasuke seemed to be on the verge of success.

After assimilating the First Hokage's cells, his Sharingan underwent a transformation, and his aura became somewhat similar to that of the Rinnegan.

"System, do you mean Sasuke is going to awaken the Rinnegan?"

This possibility cannot be ruled out.

Naruto pondered for a moment, "Will it affect the surgery?"

As of now, there is no impact.

"Let's continue to observe."

This minor incident did not affect the progress of the surgery; Sasuke was still further adapting to the First Hokage's cells.

However, the system still analyzed this, because the Rinnegan was indeed of great importance.

The last person Naruto encountered who possessed the Rinnegan was Nagato.

However, Nagato was not from the Uchiha clan, but from the Uzumaki clan, so he did not go through the process of evolving the Sharingan into the Rinnegan. According to him, he awakened it when he killed someone to protect Yahiko.

Although I felt there were some suspicious points at the time, I didn't investigate them too much.

After all, according to Kurama, the Uzumaki clan, the Uchiha clan, the Senju clan, and so on are all descendants of the Sage of Six Paths. Although the probability of them awakening their ancestral powers is extremely small, it is possible that one in a thousand years will do so.

However, after witnessing Sasuke's transformation today, the system changed its mind.

If the condition for awakening the Rinnegan is that a member of the Uchiha clan with the Mangekyou Sharingan receives a transplant of the First Hokage's cells, then where did Nagato's Rinnegan come from? And why were they from the First Hokage's cells?

There are many doubts, and further research is needed to understand them. Therefore, the system only paid extra attention to people related to the Rinnegan, such as Obito Uchiha, and continued to focus its attention on the surgery.

About ten minutes later, a delicate balance was finally achieved between the Sharingan's pupil power and the First Hokage's cells.

Sasuke opened his eyes, panting heavily.

The unprecedented pain he had just experienced almost made him faint.

Fortunately, it was all worth it.

Sasuke felt a surge of joy as he sensed the replenishment of his Sharingan's power and the increase in his chakra.

However, when he looked at Naruto, he found that the other was holding a strange-looking reagent, which was probably also the First Hokage's cells.

But the amount injected into Sasuke just now was less than a quarter of a syringe, while the test tube in front of him contained at least ten times that amount.

"Wasn't the surgery already over? What are you doing?" Sasuke had a bad feeling.

"Who told you the surgery was over?" The system glanced at him.

"I was just letting you get used to the first generation of cells so that your body wouldn't be able to react properly during the fusion and you wouldn't die on the spot."

"So, what's next..."

"That's right, the real transplant surgery is coming next!"

Chapter 125 Indra's Chakra? Use it as firewood!

At this moment, countless towering trees have appeared inside and outside the laboratory.

Clearly, this was caused by the loss of control over the primary cells.

Orochimaru watched the laboratory with great interest, extremely curious about what was happening inside.

But he was only curious; he dared not do anything presumptuous.

After all, Naruto now might actually be able to grind him to dust.

So he just stared at the laboratory with curious eyes, a greedy smile on his face.

"Naruto-kun, I wonder how many more surprises you will bring me."

Inside the laboratory, the system had already stopped paying attention to Sasuke.

Of course, this wasn't because Sasuke died on the stage during the surgery; it was just that at this point, the system couldn't do anything, and whether he could survive the surgery depended entirely on Sasuke himself.

Once the transplantation of the First Hokage's cells actually began, the difficulty naturally increased dramatically, as did the pain it brought to Sasuke.

But every time he was about to give up, Sasuke would bounce back, unleashing his unwavering will and gritting his teeth to pull through, resulting in a stalemate between the two sides.

Despite the commotion caused by the surgery, it actually indicates that the success of the surgery will be astonishing. Perhaps the ninja world will truly have another pair of Rinnegan.

Although the surgery to transplant the first generation of cells was basically over, the system did not stop there, but began to prepare for the second surgery—to remove Indra's chakra from Sasuke.

If Naruto can obtain Indra's chakra and use it as fuel to further advance the ritual, two of the three parts of the complete Oni-Garara Technique will be completed, and Naruto's strength will experience a qualitative leap.

However, just as the system was about to take action, it discovered something unexpected.

[Host, something's not right.]

"What's wrong?" Naruto asked quickly in his inner world.

I have developed a method to obtain Indra's chakra, and I can take action at any time.

Is something wrong?

The problem is that the first generation of cells exhibited a strangely strong activity towards Indra's chakra.

"Huh? Why is this happening?" As soon as the words left his mouth, Naruto suddenly realized something.

"It reacts to Indra's chakra... could it be Ashura's chakra?"

[That's right, I just analyzed the cells of the First Generation and found traces of Ashura's chakra, including a small amount of residual Ashura chakra.]

This discovery is truly astonishing, because it suggests that the First Hokage was very likely also possessed by Ashura's chakra.

Thinking of the First Hokage's easygoing personality, and the long-standing rivalry between the Uchiha and Senju clans, Naruto suddenly felt that this conjecture might be true.

"So it was the chakra of the Sage of Six Paths' two sons causing this trouble, no wonder..."

Naruto was somewhat moved after suddenly discovering the truth about the constant warfare during the Warring States period.

But then he turned his attention back to the surgery at hand.

"System, could the relationship between these two things affect the surgery?"

[Simply transplanting the first generation of cells has little effect, but it does affect the formation of the Rinnegan.]

[Perhaps one of the conditions for the formation of the Rinnegan is having the chakra of Indra and Ashura.]

"Since that's the case, let's stick to the original plan and just take away all the Indra chakra and the Ashura chakra contained in the First Generation's cells to end this thousand-year-old struggle."

The system immediately complied.

After taking Indra's chakra and Ashura's chakra from Sasuke's body, the First Hokage's cells immediately withered.

Sasuke's eye power immediately retaliated, launching a fierce attack on the First Hokage's cells.

The situation took a sharp turn for the worse. The towering trees inside and outside the laboratory first turned yellow and withered, and countless leaves fell one after another.

The withering quickly spread to all the trees, and the canopies became shaky like houses without load-bearing walls, while the trunks withered and turned black at an extremely fast pace.

Before long, all the towering trees inside and outside the laboratory withered and died.

This also indicates that Sasuke's surgery is nearing its end.

Here, the system has already transferred Ashura's chakra and Indra's chakra into Naruto's body and embedded them into the ritual.