Yin Seal

Konoha Ninja Village is generally a large and busy governing body, but the barrier department is an exception.

At least it was once an exception.

In the past, the entire department had thirty or forty people, all of whom were non-combatants skilled in Sealing Jutsu. Their job was simply to stare blankly at the large barrier, with a cup of tea and a newspaper as their daily routine.

The fierce fighting outside will not disturb the peace and tranquility here.

Konoha has been a village for over sixty years, and the Great Barrier and its Barrier Teams have existed for nearly sixty years since they were established by Mito Uzumaki, the wife of the First Hokage. During this time, the Great Barrier has only been breached twice.

The first time was when Madara, with Kurama (the Nine-Tails), sought revenge on the village, breaking the great barrier;

The second time was three years ago when Orochimaru led the Sound Ninja and Sand shinobi to attack Konoha, finding a vulnerability in the long-neglected Great Barrier.

In addition, no matter how fierce the several Shinobi World Wars were, Konoha itself was always under the strict protection of the Great Barrier and was never directly invaded by the enemy, making it a truly safe rear area.

Unfortunately, this once-powerful barrier was proven to be a mere Utakata, a paper tiger that burst at the slightest touch, during the Konoha Crush operation a few years ago...

Later, when Tsunade and reorganized the Great Barrier and the Barrier Team, she discovered that since the Nine-Tails' rampage more than ten years ago, the Great Barrier had become unstable, with numerous major flaws appearing, to the point that it had been almost worn out by some people!

In the past two years, Konoha's vitality has gradually recovered, and the Fifth Hokage has been able to take the time to reorganize the Barrier Team. He also temporarily recruited nearly a hundred people to fill this ancient department, investing a lot of manpower and resources to repair and fix the long-neglected Great Barrier. Finally, he managed to complete the repair of the most important protective barrier before the war.

Strangely, instead of shrinking its temporary size, the Barrier Team recruited another batch of ninjas, causing the department to expand rapidly.

No one knew Tsunade's intentions.

I wonder what other tasks the Barrier Team has that require organizing such a large force to complete.

Only a few people know the truth.

The newly Barrier Team, Yuki Haku, is one of these few people.

It must be made clear that Haku has no intention of switching from being medical-nin. She is also not proficient in Sealing Jutsu; most of her understanding of Sealing Jutsu comes from her close friend Sakura Haruno, who is the inheritor and modifier of the Yin Seal, an expert in Sealing Jutsu, and also Yuki Haku's recommender.

That's right, it was the privileged Sakura Haruno who appointed Yuki Haku as the acting class leader, because Sakura needed someone she could absolutely trust to manage the Barrier Team and protect her secrets.

The reason for doing this is related to a mission the Barrier Team has been undertaking over the past year.

Modify the Yin Seal.

Early on, Sakura Haruno discovered the limitations and potential of the Yin Seal. The Yin Seal was a practical and powerful Secret Technique that played a significant role in Sakura Haruno's early battles. However, Sakura quickly realized that the model of painstakingly accumulating Chakra over several years like her Master Tsunade and then unleashing it all at once was not suitable for her. She experienced more frequent battles, had a greater need for Chakra, and her daily training also consumed a large amount of Chakra, making it difficult to accumulate enough power.

So Sakura Haruno decided to improve this Secret Technique.

Open source. Expandable.

She decided to find new energy sources elsewhere, including tamed electrical energy or the power of clones, thus solving the charging problem. At the same time, she also expanded the capacity of the Chakra pool in the Yin Seal, raising its limit from Kage Level to Super Kage Level.

Dedicated research and continuous experimentation...

Initially, it was only used to store any unused Chakra each day;

Later, drawing inspiration from Sealing Jutsu techniques such as the Evil-Sealing Magic Circle, a technology for absorbing external energy as a form of energy storage was added.

Backed by the entire database and resources of Konoha (including some of the power of the Land of Snow), Sakura Haruno frantically explored the potential of this technique, fundamentally modifying it and expanding it to more than a hundred times its original size, enabling it to contain more powerful and violent energy, elevating it to a level that even its original creator could not have imagined!

A realm surpassing even the Kage Level...

Tsunade thought this was the end of the story, but Sakura Haruno told her that the story had only just begun.

This girl, whose Ninjutsu ideas (and imagination) are boundless, is planning to go all out.

She plans to tame nuclear energy and store the energy of nuclear fission within the Yin Seal!

From the level of Kage Level to a realm beyond Kage Level, Sakura Haruno is still not satisfied and still yearns to surpass it!

It surpasses even the level of "Super Kage"!

She wants to create a Secret Technique at the "Six Paths" level.

The development of the Yin Seal - Fourth Stage was carried out concurrently with the collection of fission raw materials.

Initially, Sakura still believed she could complete the design of the new seal single-handedly. She spent two months, utilizing her spare time between training and missions, to finalize the overall framework design and write tens of thousands of runes, only to discover she had completed less than one ten-thousandth of the work! This feeling of despair was like having created a detailed and complete outline, intending to write a captivating book, only to write 100,000 words just to lay the groundwork for the first plot point of the first volume, while there were still Tsukumo volumes to write...

In short, the girl was startled and immediately stopped working to re-examine the entire project, realizing the difficulty of the undertaking. According to the complete design, the entire Yin Seal would require hundreds of millions of runes to construct!

She did a quick estimate and realized that even with Shadow Clones and working non-stop every day, it would probably take several years to complete this massive project!

Fortunately, she brought up the matter later when she was chatting with Yuki Haku. Haku suggested that she ask the Barrier Team for help, which woke up Sakura Haruno from her rut.

As for what happened next, it's quite simple: Sakura Haruno openly abused her power, using the elite members of the Barrier Team to solve her problem...

"This kind of thing can't be explained in detail. Those who understand will understand, and I won't explain much to those who don't. You wouldn't understand anyway, so let's just think about it carefully. Don't ask what's going on. There are too many interests involved, and it wouldn't benefit anyone. Just pretend you don't know anything. As for the rest, you'll just have to admit that the water here is very deep, involving many things, such as someone who is rumored to be the apprentice of a village bully who gained favor because of his looks..."

--This is what the rumors are circulating outside.

Of course, such baseless and ineffective rumors cannot be stopped, after all, every village has many pretentious show-offs and envious people who pretend to know everything...

Anyway, it won't hurt Sakura Haruno a single hair.

That's the logic of this world. Sakura Haruno has the ability, so she must bear the obligation. But at the same time, she also has the right to demand that the village provide her with manpower and material support!

This is a benefit that wandering ninjas and rogue ninjas can never enjoy.

Include--

She has access to all the information, including Sealing Jutsu accumulated over decades, the great barrier protecting the village, and the secret Sealing Jutsu of the Uzumaki Clan (special thanks to the now-extinct Land of Whirlpools for their support).

She has access to a vast pool of human resources, including the village's Barrier Team, thousands of highly skilled Chunin and even Jonin, and dozens of experts who have been immersed in Sealing Jutsu for many years.

Not to mention the mountain of scrolls, contracts, rune pens, rune ink, and other materials piled up in the village warehouse...

What exactly does it mean to have the profound heritage of the largest village in the Hokage world?

That's it! (in a loud voice)

At her command, these items were at her disposal to help her complete the new generation of techniques.

The village nurtured her, and she protected the village; the village nurtured her further, and she became a pillar of the village.

They cycle and reinforce each other.

In Hokage fanfiction, why do time travelers always seem to like defecting?

Sakura Haruno occasionally thinks about her past life and finds it hard to agree with it.

In short, it was precisely because of these benefits, Konoha's abundant resources and manpower, and Sakura Haruno's overall control...

All the work was finally completed not long ago.

Yin Seal - Fourth Stage, "Yin God"

Coming soon!

This day.

Shikkotsu Forest.

While the people of Land of Rice Fields wreaked havoc and shattered the land, this desolate and uncivilized place remained as peaceful as a paradise.

It was midday, and the sun was blazing overhead.

The Shikkotsu Forest stretches for Senri, a sea of green, shrouded in mist, its ripples sparkling like a painting.

Ancient trees stand tall and gnarled in the lake, their bark as white as bone, towering into the clouds and blocking out the sun, casting vast shadows on the calm lake surface.

In the shadows, on the vast, acidic lake, floats a giant, soft-bodied beast of unknown length.

It was a Katsuyu.

It held its head high, revealing only half of its clearly striped back. The part above the water was hundreds of meters long, and its body submerged below the surface was even more immeasurably enormous. It was so large that even a small slug would appear magnificent and awe-inspiring.

This being is none other than the Sage Katsuyu.

In this world, it is clear that only the Sage Katsuyu possesses such a terrifying physique and such immense power!

Above the Sage Katsuyu's head, Sakura Haruno, her clothes fluttering, stood against the wind, like a goddess.

She stood tall, looking down at her feet.

There, a large expanse of lake water in front of the Sage Katsuyu had been frozen into a thick layer of ice.

On the ice surface, thousands of Ice Clones were busy inscribing and arranging an unprecedented, enormous, and complex Sealing Jutsu.

Black talismans were spread across the smooth ice surface, covering an area equivalent to four or five Sage Katsuyu. The tadpole-like twisted incantations were densely packed across the entire ice surface, creating a magnificent and awe-inspiring sight!

"Is this the new Sealing Jutsu?" The sage stared at the intricate and endless patterns, and even with its vast knowledge, it was somewhat astonished. "I remember, Tsunade's Yin Seal... wasn't this complicated!"

"Hmph." The girl smiled slightly, "The original Yin Seal is nothing compared to the new technique I've designed!"

She reached out and pointed to the endless, intricate runes at her feet.

"Three hundred and four hundred and fifty-nine thousand two hundred and sixty-five runes."

"This is the total number of incantations."

The reason for such an exaggerated quantity is that only in this way can the violent energy of nuclear fission be stored.

If we compare the entire Yin Seal to a reservoir, then the difference between storing the Chakra of a Kage Level ninja and storing fission energy is like the difference between a rural earthen dam and the Three Gorges Dam.

To achieve this effect, Sakura Haruno and the members of the Barrier Team researched for a long time. Finally, they imitated the Great Barrier, reversed the direction of defense, changing it from defending against external forces to defending against internal energy impacts. They removed the warning and analysis parts, removed the physical defense techniques, strengthened the energy defense techniques, and reduced the diameter of the protection, creating an anti-energy shield specifically for the Yin Seal.

Then, repeat this process continuously, layering it on top of each other!

The Great Barrier is inherently a complex and powerful Sealing Jutsu technique. After being modified by Sakura Haruno and others, its complexity and power remain undiminished, with a single barrier containing over 100,000 runes!

After stacking dozens or hundreds of layers, the number of runes required rapidly expands, becoming a single rune number.

This is only one part of the entire Sealing Jutsu.

This is an incredibly massive project.

For those who haven't experienced the industrial and information ages of the Hokage world, this is a miracle.

Just as people in agrarian and feudal times would find it hard to imagine that a country's steel production could reach over a billion tons...

Or perhaps, people from the era of classical Chinese could hardly have imagined that a book could one day contain tens of millions of words...

"How did you do that?" the Sage Katsuyu asked.

The sage had witnessed Tsunade's Medical Ninjutsu and praised her innovations highly.

I've also witnessed Hashirama Senju's Wood Release and marveled at his unparalleled fighting prowess.

I have witnessed many masters and powerful figures throughout history who could summon it, and I have even seen the heroic figure of the Sage of Six Paths at the beginning of the Ninshu.

It is knowledgeable and well-informed.

Its heart is like an ancient well.

But even today, it is still awestruck by Sakura Haruno; if it hadn't seen it with its own eyes, the Sage Katsuyu would have found it hard to believe that such complex and astonishing techniques existed in this world!

Not tens of thousands, but hundreds of millions of runes!

An incredibly vast and complex technique, yet perfectly crafted and orderly!

This is a different kind of shock.

It wasn't because of her vast Chakra, nor because of her Ninjutsu, nor because of anything about ninjas.

Rather, it stems from certain factors originating from another, more advanced, and far-reaching civilization.

Such a feat could not have been accomplished by the First Hokage without Sakura Haruno, nor by the hundred or so members of the Barrier Team, nor by the Sage Katsuyu, nor even by the resurrection of the Six Paths!

Only a transmigrator who can traverse both realms and possess the wisdom and knowledge of both worlds can dominate all of this.

Specifically...

"First, let's talk about standardized and modular design," she explained after a moment's thought.

After all, no one can design a spell that uses hundreds of millions of runes in one go, not even Sakura Haruno.

Only by relying on the wisdom and strength of the collective can we succeed.

But how do you break down an extremely complex design task and assign it to hundreds of people?

The natives couldn't imagine it, but Sakura Haruno could.

In the previous Earth, and even in modern society, there are countless examples of this.

Therefore, in her design, all the complex and powerful functions in this super-large procedure are composed of combinations and superpositions of various simple and weak modules.

The whole process is quite simple: first, design a single-function module, standardize it, then make a plan, and the rest is just stacking up a huge number of modules like building blocks.

For example, the most critical energy storage section is composed of nearly a hundred energy barriers stacked together to bind energy.

As for the energy output part, the original energy release technique is written into a standardized Chakra release module, which is connected to the energy pool outlet like a pipe, and then stacked in large quantities and finally encapsulated.

Of course, it sounds simple, but it's extremely difficult to do.

The sheer number of techniques combined is a major engineering challenge. Problems in the original techniques, multiplied ten thousand times, become an enormous and daunting difficulty.

For example, in order to achieve a higher rate of reduction, the Barrier Team redeveloped a new and more powerful Rune Reduction Printing Jutsu —this technique can be used on ordinary scrolls, which advanced the practical application of miniature scrolls by at least ten years. (1, Reduction Printing Jutsu, see Chapter 17; estimated based on the development speed of Boruto: Naruto Next Generations)

"Anyway, that's about it."

Sakura Haruno breathed a sigh of relief. After a long and complicated conversation, it was finally over.

Listening to the girl's words, the Sage Katsuyu gradually fell into deep thought.

The immortal sighed inwardly: it hadn't understood most of the explanation. But it did understand some things, such as that this was Secret Technique that combined the wisdom of many humans and was based on some guiding principle it had never heard of before, and that this new Secret Technique was extremely powerful, powerful enough to store a force greater than that of the immortal itself.

That's already at the level of the Six Paths.

Humans are a species that excels at innovation and is always capable of creating miracles.

The Sage Katsuyu had seen many such examples. And now, Sakura's new technique had once again validated his idea.

It is precisely because of this belief, this belief that humanity is not insignificant, that the powerful Sage Katsuyu condescends to make Summoning Contract with the weak human, rather than hiding in a ravine as a carefree mountain king.

The immortal was deep in thought.

Just then, Sakura Haruno's busy Shadow Clones on the ice gradually completed their tasks and disappeared, leaving behind only the huge sealing array that had been completed.

The complete magic circle consists of several concentric circles, and several curves divide it into four parts.

Sakura Haruno jumped down and landed in the innermost concentric circle; the circle was empty of runes and just big enough for one person to stand in.

She took off her shoes and stood barefoot. The cool ice surface pressed against her skin, and the chill rose from the soles of her feet, mixing with the fiery restlessness in her heart to create a complex and indescribable feeling.

Sakura took a deep breath.

She carried the Sage Katsuyu on her back, her expression unreadable, only the girl's clear, cold voice could be heard:

"Well then, I'll begin."

The Sage Katsuyu nodded.

"Let's begin... May you have great success in your military campaigns!"

Sakura Haruno raised one hand, extending her thumb, and a slight smile played on her lips.

Then, the girl gently tiptoed, releasing her Chakra, and the runes beneath her feet lit up one after another.

Buzz--!

(I feel a bit helpless and disappointed. I received a message from 1 while I was writing this, and I had a strange feeling that I didn't know what I was doing.)