Full-Level Comprehension Activates Again, Immortal Technique Chakra Cultivation Method?

Konoha Village.

The Uchiha clan compound.

Inside a certain courtyard.

Uchiha Chen was smiling as he saw Tsunade to the door. Only after she had left did he close the gate.

The smile vanished from his face as he walked over to a chair in the courtyard and sat down, lost in thought.

It had been over half a month since he returned to Konoha.

During those first few days, thanks to Tsunade's medical treatment combined with the terrifying healing capabilities of his self-healing jutsu, Uchiha Chen's injuries had completely recovered.

As for the weakness caused by his excessive use of chakra, although it had improved after these few days of rest, he still hadn't fully recovered. He couldn't help but complain that the speed of his chakra recovery was simply too slow.

After a long while, Uchiha Chen suddenly opened his eyes wide, a sharp glint flashing through them as he whispered to himself, "Although Tsunade is still suspicious of me, it's nothing serious."

Even though his injuries had fully healed, Tsunade would still find excuses from time to time to use various instruments to examine his body, under the pretext of worrying about hidden injuries.

Uchiha Chen could naturally guess some of Tsunade's intentions, so he was very cooperative with her series of "examinations." After all, he was confident that Tsunade wouldn't be able to find anything out of the ordinary.

Thinking of Tsunade's slightly furrowed brows and confused expression just now, the corners of Uchiha Chen's mouth couldn't help but curl upward.

"Although my body has recovered, my strength is still too weak. To survive in this world, the strength of a Chunin is far from enough."

"It's a pity that I was already a Chunin when I transmigrated. If I had been a Genin, how great would that have been?"

After all, as everyone knew, the Genin of Konoha were the true power ceiling of the ninja world.

"Although I have awakened the Mangekyo Sharingan, my own chakra reserves are still too low. I only used Tsukuyomi once, and I actually suffered from chakra exhaustion!"

At this moment, Uchiha Chen couldn't help but think of that future comrade who shared his plight, the "Copy Ninja" who always ended up in a draw.

He wondered if Hatake Kakashi had obtained Uchiha Obito's Sharingan yet...

Without dwelling on it, Uchiha Chen shook his head. After all, he wasn't in a position to worry about others yet.

He wasn't safe now, nor would he be in the future, especially as a member of the Uchiha clan, which made his situation even more precarious.

Because there were two madmen in the Uchiha clan—Uchiha Obito and Uchiha Itachi—who would slaughter the entire clan on the eve of their coup. This was truly a "hell mode" start.

From the memories of the original owner, Uchiha Chen knew that it was already the fiftieth year of the Konoha era, and the end of the Third Shinobi World War was not far off.

Likewise, this meant that the night of the Uchiha clan's annihilation was only a few short years away.

If the plot followed the original story, Namikaze Minato would succeed as the Fourth Hokage, followed by the birth of the protagonist, Uzumaki Naruto, and the outbreak of the Nine-Tails Incident, during which both Minato and his wife would die in battle.

As for the cause of the Nine-Tails Incident, because of some people pulling strings in the shadows, Konoha would cast suspicious eyes toward the Uchiha clan, leading to their marginalization and indirectly fueling their resolve to rebel.

"If Minato and his wife hadn't died during the Nine-Tails Incident, perhaps the Uchiha coup wouldn't have happened at all."

Uchiha Chen muttered, rubbing his chin.

In the original story, Namikaze Minato and the Uchiha clan head, Uchiha Fugaku, were friends. If Minato had lived, the Uchiha might not have been marginalized, and the possibility of a coup would have been much lower.

Therefore, to change the fate of Minato and his wife during the Nine-Tails Incident, he needed to possess powerful strength.

If he couldn't change the outcome, he had to spend these few years frantically increasing his strength. At the very least, he had to ensure his own survival against Uchiha Obito and Uchiha Itachi.

So, no matter which path he chose, he had to have powerful strength as a foundation.

But to reach a level capable of contending with the combined might of Uchiha Itachi and Uchiha Obito in just a few short years was absolutely impossible using the standard training methods of this world.

Therefore, he had to find another way.

His trump card was his heaven-defying, max-level comprehension!

His biggest weakness right now was his lack of chakra.

The chakra refinement methods passed down from the ancient era of the ninja world surfaced in his mind, and he began to circulate them to refine his chakra.

Just as Uchiha Chen expected, the results were poor!

Having had the experience of creating a jutsu before, Uchiha Chen already had an idea in mind: he would use his max-level comprehension to create a chakra refinement method suited specifically for himself!

The chakra refinement continued.

Refining chakra meant extracting one's own spiritual and physical energy, mixing them together, and finally producing chakra.

Uchiha Chen devoted himself entirely to observing the process of refining chakra.

An hour later...

[Through continuous observation of the chakra refinement process, you have gained a deep understanding of chakra refinement. You have had an epiphany and created the Advanced Chakra Refinement Method.]

"Advanced Chakra Refinement Method? Let's test the results!"

Uchiha Chen raised an eyebrow. Without changing his posture, he closed his eyes and began to execute the Advanced Chakra Refinement Method.

A few minutes later, Uchiha Chen opened his eyes again.

"The speed of refining chakra is at least ten times faster than before. As expected of max-level comprehension, but this is still not enough!"

With the Advanced Chakra Refinement Method, Uchiha Chen closed his eyes once more.

Five hours later...

[You have gained a profound understanding of the advanced chakra refinement method. Through constant contemplation of this advanced technique, you have had an epiphany and created a cultivation method for sage chakra: the Innate Breathing Technique.]

[Innate Breathing Technique]: Absorbs an absolutely balanced ratio of physical energy, spiritual energy, and natural energy to fuse them into sage chakra.

"Sage chakra? And it's perfectly balanced! Doesn't this mean I can activate Sage Mode?!"

Uchiha Chen's eyes lit up. Sage Mode could be considered one of the top-tier combat modes in the Naruto world; he never imagined he would obtain it so easily!

As expected of a cheat!

Although this wasn't his first time using his cheat, Uchiha Chen was still deeply shocked. He never expected that he could directly create a cultivation method for sage chakra!

Amidst his excitement, Uchiha Chen did not forget to immediately circulate the Innate Breathing Technique to test its effects.

In an instant, natural energy surged in from all directions, scrambling to pour into Uchiha Chen's body.

"Good, good, good! Truly worthy of the Innate Breathing Technique!"

Uchiha Chen could clearly feel his body undergoing changes; the weakness caused by his previous excessive chakra consumption was fading away bit by bit!