I, Uchiha Hikaru, have joined the chat group.

Chapter 201 "Yin Seal" Quick Mastery

This wasn't the first time Uchiha Hikaru had asked to learn the "Yin Seal".

The last time was at the end of last year, when Tsunade returned to the village and beat up Danzo.

At that time, Tsunade was in a state of indifference and indifference to everything around her, and Uchiha Hikaru was just beginning to explore the ability of "Eight Thousand Spears" to rewrite the will of others. Without certainty, it was not appropriate to use Tsunade as a test subject, so the plan was temporarily shelved.

Until now—

"...If you really want to learn the 'Yin Seal,' I can teach you."

Tsunade was silent for a moment, then took a deep breath and said in a low voice, "But I have one condition: no matter what happens, you must never use this ninjutsu against Konoha ninjas. Especially Shizune."

"no problem."

Uchiha Hikaru readily agreed.

For her, the "Yin Seal" was merely icing on the cake.

Moreover, this ninjutsu itself is not offensive; it is used to store chakra for unforeseen circumstances.

If it were a battle against the ninjas of Konoha...

She pondered that there was no one who could force her to use the extra blue bar stored within the "Yin Seal".

—If the opponent were Might Guy with all eight gates open, it could indeed pose a fatal threat to her, but at that point, let alone "Yin Seal," even "Fire and Thunder God" might be useless. It would be safer to simply travel to another world, wait for Guy's ultimate attack to expire, and then return.

Tsunade was well aware of this.

Making this request was just to get some psychological comfort.

then.

Uchiha Hikaru went a step further: "Besides the 'Yin Seal,' I'm also quite interested in a few other ninjutsu... How about selling 'Monstrous Strength'? And the 'Hundred Healings Technique,' and the contract scroll from Shikkotsu Forest—I don't mind asking for a higher price, okay?"

Tsunade: "..."

After some haggling.

Uchiha Hikaru ultimately spent 18 million ryo to purchase the lifetime rights to use the "Yin Seal," "Super Strength," and "Hundred Healings Technique," in addition to a month of personal instruction from Tsunade.

As for the contract scroll of Shikkulin...

Tsunade resolutely refused to sell, and Uchiha Hikaru had no choice but to give up.

In fact, even if Tsunade were willing, Hikaru Uchiha probably wouldn't be able to sign the contract.

Because she had already signed a spirit communication contract with Ryuji-dong.

In theory, a ninja can contract several summoning beasts simultaneously. However, entities of the caliber of the Three Great Holy Lands are unlikely to share a single contractor with another. A misstep could result in rejection from both sides, or even unilateral termination of the contract.

But...

"What would happen if Erii or Esdeath signed a contract with Shikkotsu-ryu?"

If it's the most primitive kind of magic that only uses natural energy, even humans from another world should be able to learn and use it, right?

Hikaru Uchiha kept his curiosity to himself, planning to ask Ryuchi Cave when he had time.

With her current strength, she should be able to have an equal dialogue with that White Snake Immortal...

……

Tsunade rested in bed for several days before gradually recovering from the mental shock.

During this time, she explained the "Yin Seal" to Uchiha Hikaru in oral form.

As the name suggests, "Yin Seal" is essentially a sealing technique, and an extremely rare medical sealing technique at that.

Its basic principle is to create a "reservoir" within the body by subtly adjusting the body's meridians, gradually pouring in and storing the chakra that is refined over time. When the time is right, it is released using a specific technique, allowing a large amount of chakra to be released, thus gaining superhuman combat abilities.

With Tsunade's development and refinement, the "Yin Seal" she mastered can continuously output trace amounts of chakra to construct a special technique circuit within the body, thereby continuously repairing and regulating various bodily functions and achieving the effect of eternal youth.

of course……

As a price for the improved effects, the difficulty of cultivating the modified "Yin Seal" has also increased significantly.

In the original storyline, even Shizune, who had followed Tsunade for many years, was unable to learn this move due to her lack of talent. As for Sakura Haruno, a genius among mortals, it took her nearly three years to master it.

As for Uchiha Hikaru...

While listening to Tsunade's explanation, she already sensed that this technique was very difficult.

If we measure the difficulty of ordinary sealing techniques by numbers, then the difficulty of "Four Symbols Sealing" might be 3, while "Yin Sealing" would reach 5 or even 7.

For a fleeting moment, Uchiha Hikaru even felt as if he had returned to his university classroom in his previous life, listening to Tsunade-sensei teach advanced mathematics.

You can understand what you hear, but you need to concentrate fully.

but.

When Uchiha Hikaru tried to mobilize his chakra following Tsunade's instructions, the situation changed.

"what?"

"Why does it feel...not difficult at all? Is it really that much easier than I imagined?"

Just as Uchiha Hikaru was wondering if he had made a mistake and was about to ask again...

Tsunade stared at her in astonishment, her eyes wide, as if she'd seen a ghost, speechless for a long time: "You..."

"What's wrong?"

"...Go look in the mirror."

"?"

Uchiha Hikaru hesitated for a moment before standing in front of the mirror. He first admired his fair and delicate face, and then noticed a light purple diamond-shaped mark that had quietly emerged in the center of his forehead.

This is clearly a sign of successful cultivation of the "Yin Seal"!

"It's alright, it looks pretty good. It would be great if the shape could be customized..."

This was Uchiha Hikaru's first thought.

The second thought was—

"Could it be that I'm a genius at sealing techniques?"

However, Uchiha Hikaru quickly realized what was going on.

The current outcome is likely related to her recovery.

The difficulty in cultivating the "Yin Seal" lies mainly in the first step, which is to use chakra to regulate the body's meridians and construct the technique's circuit.

This is a long-term project, and like developing a bloodline limit, it requires a lot of time to accumulate.

However, Hikari Uchiha's body had already been modified when she made her wish to Shenron. Her powerful regenerative abilities had been constantly repairing and regulating her bodily functions throughout the year.

Although the underlying principles are different.

But they arrive at the same destination by different paths.

This saved her from the most time-consuming and laborious process.

Of course, Tsunade was unaware of these circumstances.

After tentatively checking and confirming that Uchiha Hikaru had indeed activated the "Yin Seal," the nearly forty-year-old blonde woman slightly opened her mouth, somewhat doubting her life.

"As expected of the Uchiha clan's great-grandmother, her talent is simply..."

"pity……"

It's a pity he's an Uchiha.

If such a genius were to appear among the descendants of the Senju clan, it would likely be a rare stroke of good fortune. Perhaps, if it were in Nawaki, he wouldn't have died...

Tsunade shook her head, snapping out of her subconscious daydreaming, and coughed: "Your talent surprises me, but don't get too cocky. Being able to construct a jutsu circuit means you've successfully entered the field, but ultimately, the size of the 'reservoir' determines the level of the 'Yin Seal'."

The width of the meridians in the human body is limited, and the range that can be adjusted after birth is very small. Once the upper limit is reached, it cannot be widened any further, otherwise it may cause the meridians to rupture. Unless one has a constitution as rare as my grandfather, Hashirama Senju…”

"..."

Uchiha Hikaru blinked.

She was well aware of Hashirama Senju's monstrous physique. Tsunade's prized "Hundred Healings Technique" was actually just a passive ability of his.

however……

Hikari Uchiha also possesses this passive ability. In fact, her physique is even stronger than Hashirama Senju's in his lifetime.

—Hashirama's regenerative abilities are insufficient for limb regeneration; at most, he can only reattach severed limbs.

If recovery ability is positively correlated with the width of the meridians...

She probably really is a genius of "Yin Seal".

Given that he had purchased a month-long private tutoring session, Uchiha Hikaru planned to spend some time first to digest and understand the "Yin Seal" before studying the "Hundred Healings Technique" and "Super Strength".

Meanwhile, the situation within the Land of Demons has already begun to change.

……

That evening.

The setting sun is like blood.

In the very center of the capital city of the Land of Demons, in a spacious hall.

A priestess dressed in a white robe and wearing a golden crown sat on a high couch, listening to her subordinates' report.

"...Has it been confirmed?"

"Yes, Lord Miroku."

"According to the cavalry's report, the seal on 'Wraith' has indeed been broken, and the one who did it is most likely the 'Yellow Spring Cult.' We've lost contact with the garrison around Odani Castle, and General Ashiho is drawing reinforcements from other areas, but I'm afraid…"

The general paused as he spoke.

Although he didn't finish speaking, the meaning behind his words was already quite clear.

"Is the prognosis badly...?"

The priestess called Miroku sighed: "This day was inevitable after all. The existence of 'Wraith' will inevitably attract the attention of those ambitious people. The fact that it happened now is actually a good thing, at least I still have enough power to suppress it... Ryunosuke, have you received any replies to the letters you sent to the five great nations requesting help?"

"Yes."

Ryunosuke nodded: "Konoha and Sunagakure have both sent people, Iwagakure has explicitly rejected our request for help, and the other two haven't replied yet."

At this point, Ryunosuke paused, as if suddenly remembering something: "By the way, based on our investigation of border entry and exit records, we discovered something..."

"Tsunade, one of the legendary Sannin of Konoha, granddaughter of Hashirama Senju, and the unparalleled healer, may have already arrived in the Land of Demons!"

"Oh?"

Maitreya raised an eyebrow: "Where is she now?"

……

Later that day.

Western part of the Land of Demons.

A well-equipped cavalry unit galloped along the ancient bluestone road and entered the small valley town surrounded by mountains.

"……arrive."

The cavalry leader dismounted, one hand on the hilt of his sword, and said rapidly, "Everyone, search the surrounding area first. Be careful, something seems amiss..."

As a small country on the north side of the main road, the Land of Demons is not as prosperous and wealthy as the five great nations, and Odani Castle is not considered a large city. However, it still has several thousand residents on ordinary days.

But at this moment.

Not only were there no soldiers guarding the city, but there wasn't a single person to be seen on the streets. Rows of dilapidated houses sat silently on both sides of the road, casting long shadows in the twilight, making it look like a deserted ghost town. Even these well-trained soldiers felt an inexplicable pressure.

suddenly.

A cavalryman discovered a pool of blood from a street corner.

To be precise, it was a mass of flesh mixed with bone fragments, not resembling a single person, but rather the sludge left behind from the force of crushing a dozen or even dozens of people's flesh and blood under immense pressure. Under the sunlight, it emitted a strong, putrid stench.

The other cavalryman listened intently for a moment, then looked up in a certain direction and asked, "Hey, did you hear that?"

"What?"

"that is……"

A rustling sound suddenly appeared.

At that moment, everyone present heard it. And they also felt a chilling force rapidly approaching them!

"Something's coming, watch out..."

The cavalry captain shouted a warning.

But before he could finish speaking, the stone pavement on the long street suddenly exploded, and a purplish-black shadow emerged from the crack in the ground, like a thick, long snake, carrying the cavalry captain high into the air! While still in mid-air, the latter was already pierced through the chest and body, his internal organs bitten off, and bright red blood mixed with fragments of flesh and blood splattered in all directions like raindrops, instantly filling the air with a strong smell of blood!

"What...is that?!"

boom--

bang bang-

The sound of the stone slabs cracking echoed continuously.

Countless purplish-black shadows emerged from the ground, clearly countless thick and enormous tentacles! Wherever the tentacles passed, houses were smashed to pieces as if they were made of paper, and the cavalrymen present were also grabbed around the waist, their internal organs were pierced and devoured by the shadows, and their lower bodies were casually thrown out.

It all happened in just a few minutes.

Nearly a hundred fully armed cavalrymen were all killed.

After doing all this, the purplish-black tentacles slowly retracted, pressing down on the surrounding road surface and lifting up the hundreds of square meters of street to reveal a massive, mountain-like figure. Its entire body was composed of purplish-black flames, except for two lantern-sized red dots where its head was, which appeared to be its eyes.

"Lord Phantom!"

Accompanied by a few whooshing sounds.

Several ninjas emerged from their hiding place, staring at the monster with fanatical expressions.

The monster, however, looked to the other side.

There, two figures dressed in black robes with red cloud patterns stood out prominently.

"Lord Phantom."

One of them, dressed in a black robe with red cloud patterns, bowed slightly: "As agreed, we have lifted the seal placed on you and assisted you in devouring all the living people in the entire Little Valley City... So, shouldn't you now fulfill your promise and do a few things for us?"

(End of this chapter)