Rasengan (Part 1)

Yuzhen possessed simple, direct, and efficient assassination abilities, but that didn't mean he would abandon more diverse attack methods.

After all, for a ninja, the more methods they have, the more unexpected they can be in battle, and the easier it is to defeat enemies and achieve victory.

That's why Yuzhen worked hard to learn Water Style ninjutsu. With such a good opportunity before him, he naturally had to learn as much as possible from the younger version of the Water Style master.

It was a shame that this master was possessive of his knowledge, only exchanging his life for two B-rank ninjutsu and one C-rank ninjutsu.

But it was fine, no need to rush. Undermining someone ultimately required one's own effort.

After obtaining the three Water Style ninjutsu and understanding the hand seals and chakra circulation principles, Yuzhen immediately went to a place far from the camp and began practicing on his own.

He quickly learned the C-rank Water Surge, but the two B-rank Water Style ninjutsu had a noticeable learning difficulty. Yuzhen's Water Dragon Bullet looked like nothing more than a large water gun.

After a whole day of practicing without grasping the key points, he immediately went to consult the injured Water Style master who was recuperating.

Frankly speaking, it was already quite good that Tobirama Senju had given him three Water Style ninjutsu; he had no obligation to teach Yuzhen.

If Yuzhen couldn't learn these ninjutsu, it would definitely be his own problem, unrelated to Tobirama Senju.

Limited by his own conditions and comprehension, a considerable number of ordinary ninjas couldn't learn high-level ninjutsu of B-rank or above at all. If Yuzhen turned out to be beyond hope, he couldn't possibly blame Tobirama Senju.

But there was no help for it, Yuzhen kept hovering around Tobirama Senju asking for guidance.

Tobirama Senju could only endure the discomfort and point out the key aspects to Yuzhen:

"To achieve the power of high-level Water Style ninjutsu like this, pre-conversion of Water Style chakra is necessary. After converting sufficient Water Release chakra, before releasing it, it's best to pre-compress it..."

"It should feel like the chakra isn't being released, but rather propelled or erupted."

"Each step must be coordinated with your hand seal rhythm, guiding the flow of chakra."

"In short, start by practicing the amount and speed of Water Release chakra output. Proficiency in this area can only be increased by spending time..."

A master is indeed a master. Under his guidance, Yuzhen quickly grasped the essentials.

He wasn't a genius and found it difficult to learn such high-level ninjutsu in just a day or two. In fact, he didn't need to be so urgent. As long as he mastered the techniques and tricks, Yuzhen believed he would definitely be able to master this high-level Water Style ninjutsu after practicing for a period of time.

However, before Tobirama Senju left, he probably wouldn't be able to witness Yuzhen's training results.

Three days later, Tobirama Senju had barely recovered enough to move, which meant he should leave this place... Under normal circumstances, this would be the case, as he had no attachment to this place.

Furthermore, being away from his clan for too long would inevitably cause worry, and Tobirama Senju couldn't waste any more time outside.

Tobirama Senju thought this subjectively, but Yuzhen would objectively create conditions for him to stay.

Yuzhen knew that Tobirama Senju was about to leave, so after approaching him again, he didn't discuss Water Style anymore. Instead, he started discussing the development of a new ninjutsu.

This was a good entry point.

What kind of entry point?

If you want to fish, you have to bait the hook, right? Yuzhen had already repaid Tobirama Senju's "life-saving grace." If he wanted to get anything else from him, he had to offer something valuable this time.

And if you were to ask what was the most valuable ninjutsu Yuzhen had mastered and could present, it would naturally be something that borrowed from others.

"Tobirama, I've seen your Body Flicker Technique. You can kill an enemy in an instant, yet when you flicker, you can only use taijutsu and ordinary ninja tools for attacks. Have you ever encountered a situation where your attack power was insufficient? You know, flicker attacks are contradictory to slow hand seal casting..."

Was this academic discussion? This kind of conversation was more acceptable to Tobirama Senju than teaching Water Style, so he temporarily suppressed his intention to leave and said, "That's true. Sometimes I encounter situations where I can't break through an enemy's defense. No matter how fast the flicker, it's meaningless."

Yuzhen nodded, a look of "just as I expected" on his face. "Have you ever considered using instantaneous, hand-seal-less ninjutsu in conjunction with the Body Flicker Technique?"

"Hand-seal-less ninjutsu? I've had ideas and experiments, but haven't achieved practical results. After all, it's through hand seals and techniques that abstract energy is converted into a tangible form, allowing chakra to exert its true power. Hand-seal-less ninjutsu goes against this traditional understanding."

"Form... yes, form is indeed necessary." Yuzhen agreed with this statement, but then immediately added, "However, form doesn't necessarily require hand seals to be achieved. In fact, the ultimate physical transformation of chakra can also bring unimaginable destructive power."

As he spoke, Yuzhen raised his left hand, and a rotating sphere of chakra appeared in his palm. However, the energy density and rotational speed of this chakra sphere were severely insufficient, making the technique appear to lack power.

That's right, what Yuzhen was talking about was the Rasengan.

Upon arriving in this world and confirming he was in the Ninja World, Yuzhen began developing this powerful and difficult ninjutsu. This meant he had already spent a year on the Rasengan.

The Rasengan is one of the few ninjutsu in the original work whose training process was described from beginning to end. It wasn't strange that Yuzhen focused on it.

But the training difficulty of this ninjutsu was extremely exaggerated, and thus he hadn't made any substantial progress.

This wasn't to say his comprehension and learning ability were poor. The reason was simply that his talent wasn't good enough... His chakra quality and energy density simply didn't meet the threshold for learning the Rasengan, making it impossible to succeed without the necessary resources.

"It doesn't seem practical..."

Tobirama Senju stared at Yuzhen's left hand for a while, then shook his head with some disappointment. But it was clear that he was very interested in the development of this new ninjutsu.

As everyone knows, Tobirama Senju was the greatest, most imaginative, and most unconventional inventor before Orochimaru. Discussing the development of new ninjutsu was definitely his point of excitement.

"To achieve the power of this ninjutsu, three conditions are required: high-density chakra, extreme energy compression, and super-fast self-rotation. Currently, I find it difficult to achieve all three conditions simultaneously," Yuzhen said.

His chakra wasn't up to par before, but now he could try again.

Naruto Uzumaki of the Konoha era, as the most famous master of hand-formed spheres in history, made unimaginable contributions to the development of the Rasengan.

It was precisely because of Naruto's "clumsy method" that the Rasengan's super A-rank learning difficulty was reduced to below B, as he creatively incorporated shadow clones when using the Rasengan.

When using hand-seal-less ninjutsu, one still had to perform hand seals. It was hard to say whether this was an evolution or devolution of the Rasengan; one could only say Naruto's thinking was quite peculiar.

"This technique naturally aims for single-handed instantaneous release, which is the most practical. However, during the process of breaking it down and learning, there's no need to be so strict. Develop the technique first, and then consider its practical application later."

As he spoke, Yuzhen placed his right hand over his left, and then the loosely formed chakra was compressed bit by bit towards the center of both hands, finally forming a small, light blue sphere.

It seemed to actually resemble the Rasengan a bit? Unfortunately, it was only an outward appearance; this chakra sphere was static.

"One hand to maintain energy release, one hand to maintain shape transformation. It's a shame I don't have a third hand," Yuzhen said with regret in his tone.

Tobirama Senju reacted quickly, already learning to answer before being asked. "A third hand? How about a Shadow Clone?"

"I come from a small ninja clan with little heritage, so I don't know the Shadow Clone Jutsu."

"I..."

Tobirama Senju almost blurted out "I can teach you," but he stopped himself before the words left his mouth.

Because he realized he might have been tricked again.