It's Common Sense for Bloodline Clans to Have Bloodline Diseases

Izuna hummed and hawed all the way as he followed Madara.

Inside the infirmary, Uchiha Yuan wasn't actually practicing chakra at this moment, but was instead researching something else.

Chakra Breathing Method!

This was a technique recorded in a fanfiction novel Uchiha Yuan had read in his past life.

It was evolved from moves in a certain blade anime and JoJo. In the blade anime, energy in the air was drawn in through breathing, and unique energy was born through body organs in a specific order, using weapons to achieve ever-changing techniques to deal with enemies.

In JoJo, energy was likewise drawn in to produce another thing called the Ripple, and the effects were even more diverse, even reaching the point of altering space and bringing the dead back to life.

In that fanfiction novel, the Chakra Breathing Method had the effects of strengthening the physical body and restoring chakra.

It might seem useless at first glance, but what Uchiha Yuan had his eye on was precisely that physical strengthening.

The Senju Clan had stood until today precisely because of their abundant chakra and powerful bodies, and Wood Release was currently mastered by Hashirama alone. Calling it a bloodline limit—actually, anyone with clear eyes could see that if Asura's soul weren't lodging inside him, he might not be able to master Wood Release either.

Therefore, whether the body was strong had a great deal to do with how far the path he would take in the future went.

Time flowed slowly, and after a whole morning passed, Uchiha Yuan opened his eyes.

Hah... I ran into a problem before even starting, truly deserving of myself~

He was a little speechless, and really couldn't understand why he wasn't the protagonist of those power fantasy novels, but had to be a tragic wretch instead, having to figure everything out himself.

The problem he had currently encountered, speaking of which, was also related to the hand seals that ninja had long relied on.

First, after refining chakra, the body itself formed a sort of inertia, and hand signs acted like molds used to shape chakra.

The higher the control over chakra, the fewer seals needed to be executed. For instance, in the later stages of the Naruto World, there was Momochi Zabuza's Water Dragon Bullet with forty-nine seals, and Senju Tobirama's Water Dragon Bullet with a single seal, and even Senju Hashirama with his hands clapping together and shouting whatever he pleased.

These were all manifestations of chakra's controlled habits over the body.

Yet today, the problem Uchiha Yuan faced was how to alter the refining and circulation sequence of chakra, allowing the body to automatically refine it through breathing alone, and then go a step further to achieve all-weather, full-focus constant use.

It looks like this step will need time to grind away. The body's habitual nature is simply too severe. If one starts practicing from childhood, it's actually quite easy.

Although the refining method Uchiha Yuan studied belonged to his clan, its characteristics were nothing more than slightly higher speed and quality, and other clans were pretty much the same. Basically, through these thousands of years of time, they had reached a point where further progress was impossible.

Uchiha Yuan didn't want to go to the trouble of creating an exclusive refining method either, because that was purely a thankless task of wasting effort.

In this Naruto World, chakra wasn't the only type of energy. Before chakra existed, the world itself possessed a kind of energy called natural energy.

It was a power born naturally from all things in heaven and earth, no weaker than chakra by comparison. Understood simply, it was the myriad spiritual qi used in immortal cultivation.

Uchiha Yuan got up and stretched his body. Having sat all morning, his legs were a bit numb.

Huh? What was that smell?

He sniffed with his nose. What meat was roasting to such a fragrant aroma?

His gaze swept toward the doorway, and the scent was coming from right there.

Uchiha Yuan put on a pair of wooden geta with exposed toes, pushed the door open, and saw a half-meter-long roasted fish wrapped in unknown leaves placed right at the threshold.

He reached out and picked it up. There was still residual warmth inside, but the surface had already cooled down, looking as though it had been placed there for quite some time.

Roasted fish? It must have been left by that cheap brother of mine, Izuna.

As for Madara? Uchiha Yuan truly didn't wish to see him too early, and besides, he didn't know how to get along with him either.

On one hand, the impressions in his original memories were too deep, making it hard to treat him as an older brother and kin. On the other hand was the original host.

Madara wore a stern face all day long, looking as if everyone owed him money. Even though Uchiha Yuan knew he was cold on the outside and warm on the inside, the original host didn't know that, and so had always been very afraid of him.

Respect, yearning, worship, fear, and panic—amidst such intermingling emotions...

Uchiha Yuan happily finished eating that roasted fish.

Mmmm, so good.

In the afternoon.

Uchiha Yuan continued to study the breathing method, practicing hand seals whenever his brain grew tired. Although hand seals would eventually be phased out by himself, right now his strength was "weak," and he still desperately needed them.

Moreover, he was still a wounded patient at the moment, giving him plenty of time to strengthen himself.

A full week passed slowly.

Within the Uchiha Clan Grounds, a high-level operational meeting was underway inside Uchiha Tajima's room.

"Speak your minds. What do you make of this matter?"

Uchiha Tajima sat in the primary seat, with Madara and Izuna seated on his left and right respectively, while the remaining high-ranking members lined up in order.

It was worth mentioning that the presence exuded by each of these Uchiha higher-ups was not insignificant, possessing at least the strength of jōnin or even elite jōnin.

"Clan Head! The minor Kaguya Clan fails to recognize the situation. It has been quite a while since the last beating, and I think it's time to make them hurt, otherwise they won't know who the master is!"

"Seconded!"

"I agree too."

"Hmph!"

Uchiha Tajima raised a hand and pressed down lightly into the void, then looked toward his eldest son, Uchiha Madara.

"Madara, you are currently in the position of heir apparent. What are your views regarding the Kaguya Clan?"

Uchiha Madara thought for a moment, his eyes narrowing slightly as he said slowly:

"It's nothing more than a big stick and sweet carrots. However, this clan behaves like dogs, and I think we can find an opportunity to completely eradicate them. After all, if news that our clan possesses Frostbone Grass were to leak, it would inevitably stir up their ambitions."

"Hmph!"

Uchiha Tajima then looked at his second son, Izuna, and asked in the same manner:

"Izuna, what do you think?"

"Ah? I'll listen to Big Brother in everything!"

Hearing this reply, Uchiha Tajima shook his head and chuckled. He had known it would be like this. Although brotherly affection and harmony were fine, every conflict in the Warring States period was unpredictable, and nobody knew when they might suddenly encounter some unexpected mishap.

He actually hoped Izuna would have ideas of his own, but it looked unlikely to be corrected.

So be it!

"Alright! Since everyone feels they need a lesson, then make battle preparations. This time, strive to snap one of Kaguya's dog legs!"

"Understood!"

The Kaguya Clan, also known as the Shikotsumyaku Clan, was so named because they possessed a bloodline limit called Shikotsumyaku, which had the effect of turning bones into chakra-infused material, allowing them to perform many unique bone ninjutsu.

Yet bones, while they could be shot out or even snapped once imbued with chakra, were still chakra bones, and thus had to be retracted most of the time. Because of this, the Kaguya Clan contracted a certain bloodline disease.

The bloodline disease was widespread and had no cure to this day, capable only of being alleviated, and Frostbone Grass was the lifeline of the Kaguya Clan.

However, Frostbone Grass only grew in gloomy, damp places, requiring an environment heavy with Yin Qi to nurture, and coupled with the extreme difficulty of cultivating it, its numbers were dwindling day by day.