Chapter 127: Yin Seal
A few days have passed since Naruto's departure.
In a certain laboratory.
"Wuwuwuwu~ I'm already a salted fish!"
The pink-haired girl sat down on a chair, half of her upper body slumped against the table, letting out a bored groan.
By her hand, on the table, at her feet, on the floor, were piles of various scrolls and papers, most of which were sealing papers filled with incomprehensible formulas.
"The sealing formula for the Yin Seal is actually this complicated!"
Haruno Sakura scratched her hair and said wearily.
The reason she was learning the Yin Seal now was not because Phase Two of Sakura Rush was complete and she was starting to learn the next ninjutsu, but was based on Tsunade's suggestion.
As the development of Sakura Rush deepened, the amount of chakra consumed in each experiment also gradually increased. Often, she would set aside a whole morning for experiments, only to run out of chakra in one or two hours.
"You don't completely use up your chakra on daily missions, so you often have a lot of chakra and stamina left over. In that case, you might as well learn the Yin Seal first and accumulate your daily surplus of chakra to use during experiments."
That's what Tsunade had said.
To sum it up in one sentence: A craftsman must first sharpen his tools if he is to do good work.
It made a lot of sense.
—But what was she supposed to do with tens of thousands of sealing formulas!
When she opened the ultimate principles scroll of the Yin Seal, thousands of sheets of paper filled with formulas had popped out with a poof, almost drowning her in a pile of paper—Sakura almost thought she had opened the blueprint library for an aircraft carrier.
The sheer number was enough to make one break down.
The Yin Seal was a ninjutsu passed down from Mito Uzumaki, that is, the First Hokage's wife. Before this, this ninjutsu had been developed and researched by the seal-proficient Uzumaki clan for a long time, which was why it had become so vast that almost no one could fully understand it.
Fortunately, Tsunade had told her that she just needed to copy them onto her body one by one, without needing to understand the meaning of the formulas.
But even so, this was not a simple matter. When the number of runes reached a certain level, some things that were originally not problems also became problems.
For example, the surface area of the body is only so large. How could she write so many runes on it?
The answer was a matching rune-shrinking jutsu. Tsunade had very thoughtfully placed it together with the blueprints for the Yin Seal: it could shrink a palm-sized rune to the size of a grain of rice, while still maintaining its clarity and functional stability.
In addition to this small ninjutsu, there were also two palm-thick user manuals and detailed explanations of the formulas, which comprehensively and in detail described the method of use and possible problems.
The girl was sure that without this user manual, even if all the formulas used in the Yin Seal were made public, if there wasn't a room full of seal-proficient experts to assist, no one would be able to successfully cast the Yin Seal.
This thick manual and the tens of thousands of sealing formulas were the crystallization of the Uzumaki clan's wisdom. In the power-worshipping world of Naruto, this ninjutsu was truly a clear stream.
And its method of use could also be called idiot-proof. As long as you wrote the formulas on your body according to the manual, you could use it. No understanding, no training needed...
The Yin Seal was the only ninjutsu Tsunade felt her disciple could learn without seeking a deep understanding. In fact, even she herself did not fully understand the meaning contained in these tens of thousands of runes. Perhaps even among the Uzumaki clan back then, there were not many who could fully understand this jutsu.
However, Sakura deeply detested this approach of knowing the "what" but not the "why." Her personality was such that for any ninjutsu she used often, she had to research it thoroughly, then add her own personal style until it was completely transformed before she would stop.
So this girl, who did not understand the hardships of the world, resolutely opened the manual and the detailed explanation, intending to fully understand this ninjutsu that even Tsunade had not completely figured out.
And an hour later, she had become the listless, will-less salted fish from the beginning of the chapter.
Wah, my dick is gone, what's the point of talking about ninjutsu? Forget it, just let me be a salted fish. (Ah, I've mixed up my lines, cross that out.)
Tens of thousands of runes, the crystallization of the efforts of several generations, were really not something a greenhorn like her could understand at once.
With the annotations, she could at least understand the simplest part: the entire sealing formula, in fact, more than half of its function was to maintain the stability of the sealing jutsu itself, forming a solid framework.
Within the framework was the unique content of the Yin Seal, which could be simply divided into two parts. One was the energy storage part, which could convert the chakra extracted from the human body into another form of energy and store it in crystalline form. The other was the energy release part, whose function was to release the energy stored in crystalline form as chakra.
But going any further, how these formulas achieved their functions, Sakura was at a complete loss.
This feeling was like seeing a post online teaching everyone how to draw. The first step was to draw two eyes, a nose, and a mouth. Then draw a head and a body. Finally, fill in the details, and a lifelike portrait would emerge! The key was, how exactly do you fill in the details?! The second step was still a child's doodle, but the third step had become a realistic portrait. What on earth happened in between?!
For example, the energy storage part was composed of tens of thousands of formula runes. Looking at them individually, there were many runes whose meaning she did not recognize, let alone the complex structure they formed when combined.
Regarding sealing formulas, Sakura had learned some of the basics at the Ninja Academy. She could also store some ninja tools or the water needed for a ninjutsu in a sealing formula. These formulas were usually composed of a few to a few hundred runes, with a relatively simple structure, and used the most basic runes.
But the Yin Seal was far from being that simple. When it involved the complex human body, with its fifty trillion cells, it could not be treated as simply and crudely as a steel ninja tool. So the number of runes used here had jumped from the order of hundreds to over ten thousand.
However, if Sakura could really fully understand its contents and innovate, then it would not be difficult to launch a Haruno Sakura version of the Yin Seal. The operability of this Yin Seal was actually very strong. When Sakura got the scroll, she had already begun to exert her imagination, and many inspirations had immediately popped into her mind.
For example, if she created many of her own clones, and then used the Yin Seal to gather their chakra—mainly their physical power—and give it to herself, wouldn't she have obtained an endless source of chakra?
Hn, the 20,000 Haruno Sakura Sisters Project is officially established, the girl thought with delight.
This project actually didn't require too many changes to the Yin Seal. It would still be storing the chakra produced by the clones in the Yin Seal—of course, Sakura would restrict the clones from producing self-awareness, so the spiritual power contained in this chakra would be approximately zero. But that was okay. Sakura's own spiritual power was large enough, so it wouldn't cause an imbalance of yin and yang in her chakra.
There was no need for too many modifications to the Yin Seal either. She just needed to change the generation point of the crystal in the energy storage part from the clone's forehead to the original's forehead. This way, she wouldn't need to study the entire Yin Seal thoroughly, just understand a specific detail and know how to modify it, which would greatly reduce the difficulty of development.
Even if she didn't modify it, it would be fine.
She could forcibly remove the Yin Seal from the clone's forehead and have the original use it. As long as the clone did not produce a personal consciousness, Sakura would not feel that this act violated any ethics. What a joke, I'm in the Naruto world, do you really think I'm trying to be a pure white lotus saint?
As long as it was something that could improve her own strength, and as long as it was not something that was morally outrageous, she would not refuse it.
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