Rapid Growth in Strength

In the morning mist of Konoha Village, patrolling ninja moved through the streets like ghosts, their footsteps light and swift, leaving no trace.

As the spy incident continued to escalate, every corner of the village came under strict surveillance. Even the remote alleyways usually ignored were now covered by the watchful eyes of ANBU ninja.

"Captain, do we really need to cover even little corners like these? Hardly anyone ever comes here!"

A rookie ninja who had just joined ANBU could not help complaining to his captain.

"Shut up. Weren't the places where the incidents happened previously places with hardly anyone around? It already happened. All we can do is do what we can and minimize the chances of the same thing happening again!"

The ANBU captain leading the team had vigilance and determination in his eyes. Not even the slightest disturbance could escape his notice.

Meanwhile.

The Uchiha Clan members of the police force were especially busy during this incident.

Their figures appeared frequently beneath the night sky, and every clan member had been mobilized to take part in patrols and investigations.

Because of the spy incident, Hiruzen Sarutobi personally sought out the current head of the Uchiha Clan, Fugaku Uchiha.

He expressed his hope that the Uchiha Clan would strengthen their patrols during this period and protect the village's security.

The relationship between the Uchiha Clan and the village had never been particularly good, and voices calling for rebellion had even begun to arise within the clan.

As the Uchiha Clan's head, Fugaku naturally could not stand by and watch them go to their deaths.

This mission was a perfect opportunity to ease the relationship between the Uchiha Clan and Konoha Village's residents, so Fugaku readily agreed.

However, this sudden mission disrupted the lives of the Uchiha Clan members in the Konoha Police Force. Their once peaceful daily lives were replaced by tense patrols.

Some Uchiha clan members began to complain. They felt weary and dissatisfied with the abrupt change, believing that Hidden Leaf was unilaterally exploiting their labor over a nonexistent spy incident.

But even more Uchiha clan members who loved peace silently took up the responsibility. They knew that as long as they patrolled properly, they could repair the Uchiha Clan's poor image among the villagers.

Under such tense circumstances, Naruto's friends could only stay at home.

The parents from the major clans naturally understood the impact of this incident better than ordinary villagers.

It was not just the spy incident. There was also an undiscovered taijutsu expert, at least at jonin level, hiding within Konoha Village, and there was not even the slightest clue about them.

Their parents worried about the children's safety and would not allow them to go out until the turmoil had subsided.

"I want to go play with Naruto, don't you, Akamaru?" Kiba Inuzuka rolled around on the floor at home. Even Akamaru, who was usually sensible and obedient, barked a few times in agreement.

"What is Naruto doing right now?" Ino helped tend the family flower shop while spacing out, wondering what Naruto might be doing at this moment.

"Delicious, so delicious. Has Naruto eaten yet? Next time, I'll definitely beat Naruto and eat even more than him!" Choji, who was stuffing himself with grilled meat, thought of Naruto.

"What a drag, what a drag. It's great that I don't have to go out." That was Shikamaru. He had never liked going out to begin with. His mother had to force him out every time he went to play with his friends. Although playing with them was quite fun, it was still such a hassle!

This spy incident truly left some delighted and others miserable!

Naruto had nothing much to do alone at home either. The spy incident restricted his movements, and he could no longer wander around the village as freely as before.

There were also more ANBU around his home watching him. Compared with before, they were now more concerned with protecting his safety. After all, with something like this happening, the safety of a jinchuriki was still very important.

However, that did not stop him from secretly slipping out every night to train in even more remote places.

For safety's sake, he had no choice but to use the Shadow Clone Technique while activating Kagura's Mind's Eye to keep watch, ensuring that no one would discover his secret training.

During this period, without anyone else bothering him, Naruto devoted all his thoughts to training.

Naruto first spent some time training taijutsu, solidifying his foundation.

He knew that as a ninja, powerful taijutsu was indispensable. I may not use it in battle, but I can't afford not to know it.

His body became stronger through training. Every punch and every kick was filled with power.

His movements became faster and more precise, and his reactions became sharper as well.

In battles against his shadow clones, he constantly challenged his limits. Every time he fell only made him more determined to rise again and continue fighting.

After training in taijutsu for some time, Naruto's taijutsu reached a considerable level of proficiency.

So Naruto began training ninjutsu again.

Naruto began practicing the two ninjutsu he had newly acquired: the C-rank Wind Release: Great Breakthrough and the C-rank Fire Release: Phoenix Flower Fire Technique.

With Naruto's immense talent and the cheat-like assistance of the Multi Shadow Clone Technique, he easily learned both techniques.

They did not take much time at all.

He also discovered that as long as he poured in more chakra, both techniques could unleash greater power. With additional chakra, the destructive force of these two C-rank ninjutsu could at least rival B-rank ninjutsu.

No wonder Madara Uchiha had used a B-rank Fire Release ninjutsu during the Fourth Shinobi World War—Fire Release: Majestic Destroyer Flame. He had spewed out a vast sea-like expanse of fire, covering an enormous area.

Its power rivaled S-rank ninjutsu! The Allied Shinobi Forces had needed over twenty ninja from the Hidden Mist forces to use Water Formation Wall simultaneously just to block Madara's Majestic Destroyer Flame.

Having a huge amount of chakra really let one do whatever they wanted.

This gave Naruto more choices and variations in battle.

He began trying to combine the two ninjutsu, creating new methods of attack.

As the saying went, fire borrowed the force of wind. With proper chakra allocation, the power of his combined ninjutsu could double.

His attacks became more varied and harder to predict.

After finishing his ninjutsu training, Naruto felt that his arsenal still lacked a high-power ninjutsu.

He lacked the kind of technique that could kill with a single blow.

He thought of his signature technique from the original story: the Rasengan.

This ninjutsu, created by the Fourth Hokage Minato Namikaze after taking inspiration from the Tailed Beast Ball of the Tailed Beasts, was renowned for its tremendous power and unique form.

Just as Naruto thought about learning the Rasengan.

"Ding. System mission issued. Host, successfully learn the Rasengan."

The Rasengan was already a ninjutsu Naruto wanted to learn, and now he could also receive an additional mission reward. This was truly wonderful.

The Rasengan—this technique required no hand seals. The user could perform it with one hand, two hands, or even three hands.

There was no essential difference. It only depended on the caster's chakra control. The Fourth Hokage, Kakashi, and Jiraiya could use it one-handed.

In the original story, Naruto's control was relatively weak in the early stages, so he needed "someone else"—that was, a shadow clone—to help. It seemed that the more hands used, the easier it was to gather chakra, and the more powerful the ball being formed would be.

Beginners, such as Naruto when he first learned it in the original story, had to use both hands. One hand was positioned to gather the chakra sphere, while the other continuously pressed back and forth over it. Both hands released chakra at the same time until a chakra sphere formed.

Afterward, if chakra control improved further, one could use just one hand to release chakra, control it properly, and practice the technique.

Learning the Rasengan was divided into three stages.

The first stage was releasing chakra from a part of the body, such as the feet or hands. Kakashi had taught Naruto and the others this before, and they had learned it successfully.

The second stage was continuously releasing a fixed amount of chakra, a further exercise beyond the first stage.

The third stage involved water balloon and balloon training: maintaining the released chakra and giving it tangible form until one could burst the balloon. Once this stage was complete, the Rasengan could already cause damage, though only very light surface injuries.

The final stage was combining everything from before: gathering chakra in the hand, continuously releasing it, maintaining it, and finally condensing it into a miniature typhoon.

The technique instantly became extraordinarily powerful. Not only could it cause greater surface damage, it could also penetrate the enemy's body and destroy them from within.

However, the Rasengan had one weakness: it could only attack in a straight line. But it also had a major advantage—it did not require much chakra.

Moreover, the more chakra poured into it, the greater its power became.

Following the training method from his memories, Naruto purchased the corresponding materials.

He began practicing the Rasengan. The process was not easy and required extremely high control and precise chakra manipulation.

Naruto had excellent talent, and with no interference from the Nine-Tails, his training went relatively smoothly.

Naruto and his shadow clones tried again and again, constantly failing, then trying again.

Their palms became red and swollen from the rapid rotation of chakra, but they did not give up.

After every failure, Naruto carefully considered the reason for it, adjusted his method, and tried once more.

After countless failures and efforts, Naruto had lost track of how many shadow clones he had created.

But Naruto finally found the feeling.

"It's coming, it's coming! I've got the feeling! My ball-rolling technique is about to be complete!" Naruto instantly became extremely excited.

He felt the chakra forming a stable rotation in his hand. The rotation grew faster and denser, eventually taking on an almost perfect spiral shape.

He successfully created a small Rasengan. Although its current power could not compare to that of the Fourth Hokage, that was only because Naruto was still in the exploratory stage and had not poured much chakra into it.

After successfully using the Rasengan, Naruto did not rush to rest.

He knew to strike while the iron was hot. So Naruto continued training, constantly improving the Rasengan's power and stability.

His shadow clones did the same. As batch after batch of Multi Shadow Clones continued to disperse and be created.

Naruto's experience grew richer, and his command of the technique became increasingly effortless.

As time passed, Naruto became increasingly proficient with the Rasengan and could control this powerful ninjutsu at will.

Now, unlike in the original story, he no longer needed a shadow clone's help to successfully use the Rasengan.

As long as Naruto wanted to, chakra could gather in his hand with incredible speed, and a sphere would take shape almost instantly.

And as Naruto continued pouring chakra into it, the sphere would grow larger and larger.

Though it was an A-rank ninjutsu, its destructive power was far beyond A-rank!

As Naruto's strength continued to rise, he became more and more confident.

In a few more years, he would be able to roam freely through the ninja world!

After this period of training, Naruto had also become more mature and steady.

Time slowly passed. As the spy incident gradually settled down, Konoha Village once again returned to its former tranquility.

It seemed as though nothing had changed, yet it also seemed as though everything was slowly changing!

"Congratulations, Host. You have completed the mission and successfully learned the Rasengan!"

"Congratulations, Host. You have obtained the reward: Hyuga Clan bloodline!"

"I knew it. Another bloodline added. I could gather all the bloodlines in my body and play mahjong with them!" Naruto was very satisfied with this reward.

But at the same time, he had some doubts.

"System, I have a question. I now possess both the Uchiha Clan bloodline and the Hyuga Clan bloodline. If I have both the Byakugan and the Sharingan, will they conflict? Or can I only switch between them?"

Naruto raised his question.

"Answering the Host: as long as the ninja bloodlines in the Host's body fully fuse, the Host's eyes will fuse as well. As long as the Host wishes it, the Sharingan can be activated while the Byakugan is active. Even after the Host obtains the Rinnegan and Tenseigan, both can be activated simultaneously."

"The Host will retain all the special abilities of the activated eyes!"

"Holy crap, System. Are you really trying to make me invincible?!"

After obtaining the Hyuga Clan bloodline, Naruto quietly returned home and began catching up on sleep.

Every time he obtained a new bloodline, his body needed some time to fuse with it.

He was used to it. Time to sleep!

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