Having made up his mind, Seimei no longer paid attention to the evolution of the Sharingan or the enhancement of his "physical constitution" attribute. Instead, he focused on the newly added skills on his panel.

Even though he had not deliberately practiced, his skills "Demonic Illusion: Mirror Heaven and Earth Change" and "Transcription Seal" had still improved slightly.

Among them, "Transcription Seal" was too closely linked to the Mangekyō Sharingan, which weakened its proficiency in the sealing arts.

As a result, even though his "Eight Trigrams Sealing Technique" had reached perfection, it had only slightly boosted the proficiency of "Transcription Seal," increasing it by just a few points.

On the other hand, "Demonic Illusion: Mirror Heaven and Earth Change" had improved significantly. Due to his intensive practice of "Genjutsu: Darkness Technique" and "Nirvana Temple Technique" in recent times, its proficiency had increased by dozens of points, reaching LV0 (75/100), just one step away from entry-level mastery.

Of course, whether it was a few points or dozens of points, none of it really mattered to Seimei. Once he devoted a large amount of chakra to training, these numbers would become insignificant.

What interested him more were the two forbidden ocular jutsu: "Izanagi" and "Izanami."

When he had first imprinted them onto his panel, he hadn't planned to invest chakra into practicing them immediately, so he had not given them much thought.

Now, recalling the records in the secret technique scrolls, it seemed that these two ocular techniques could be used easily as long as one understood their principles and casting methods.

In that case, was there even a point in grinding proficiency?

Seimei felt a bit lost. He wanted to experiment but, after some thought, decided against it.

It wasn't that he was afraid of harming his eyes—there was a difference between practicing and actual combat.

Based on past experiences, for secret techniques that could potentially harm him, he didn't need to forcibly cast them. As long as he could comprehend their principles, understand their casting processes, and make an effort in that direction, he would still gain proficiency.

So, self-mutilation was entirely unnecessary.

Of course, if he did resort to self-mutilation, he could indeed gain proficiency at an accelerated rate.

This had already been tested when he practiced the S-rank forbidden jutsu—"Wind Style: Rasenshuriken."

Back then, however, he had used shadow clones to take the damage in his place.

Now, shadow clones couldn't use "Izanagi" or "Izanami," even if they possessed the Sharingan.

At the end of the day, the Sharingan they wielded was merely a projection of his own, lacking the true power and effectiveness of the original.

Of course, these were just side details. The real reason he chose not to practice them now was that he had more important matters to attend to.

Yesterday, when his "Eight Trigrams Sealing Technique" was about to reach perfection, he had decided to spend a day developing a new sealing technique.

Now that the conditions were met, he naturally had to follow through with his plan.

With that thought, Seimei closed his panel, formed a hand seal, and activated "Multi Shadow Clone Jutsu."

Boom!

A burst of chakra smoke erupted, and over a hundred clones materialized on the island.

Seimei looked at his shadow clones and, without wasting words, immediately divided them into groups.

He assigned each group different approaches, instructing them to develop a new sealing technique based on the "Eight Trigrams Sealing Technique." They were to integrate elements of the "Guardian Sealing Technique," the "Sealing Formation," and the "Curse Seal of Self-Imprisonment" to create a container capable of holding the Seven-Tails.

A day might not be long, but it was enough.

He didn't need this sealing technique to be perfect—just functional enough to lay the foundation.

With this framework in place, he could use the proficiency panel to continuously refine it, ultimately forming his own ultimate sealing technique tailored specifically for Tailed Beasts.

Various thoughts flashed through his mind as Seimei observed his clones, some deep in thought, others testing blindly, and some discussing theories with each other. A smile appeared on his face.

Even Naruto had developed the prototype of the S-rank jutsu "Wind Style: Rasenshuriken" in a short time using this method.

Seimei possessed broader knowledge, a stronger foundation, and the aid of the proficiency panel—there was no reason he couldn't accomplish the same.

At this moment, Seimei was filled with confidence.

...

An hour later.

Seimei dispelled "Multi Shadow Clone Jutsu" and absorbed all of his clones.

In an instant, a vast amount of training experience and memories flooded his mind.

Seimei quickly closed his eyes to process the influx of information.

Because all the clones had worked toward the same goal, even though they took different approaches and had varying experiences, their results ultimately converged, making it easy for him to assimilate the knowledge.

Thus, within about fifteen minutes, Seimei had sorted through all the information.

After thinking for a few more minutes, he once again formed a hand seal and activated "Multi Shadow Clone Jutsu."

The familiar scene repeated itself—over a hundred clones reappeared.

This time, without needing instructions, they each found a place to continue refining the technique based on Seimei's adjusted approach.

And so, again and again...

At this moment, Seimei resembled an artificial intelligence from his past life, constantly iterating his algorithm, increasing efficiency, and clarifying his goal.

Eventually, after an exhaustive investment of effort, as night approached, he finally completed the prototype of his sealing technique.

Looking at the technique he had developed, Seimei pondered briefly before naming it—All-Encompassing Seal.

The name alone reflected the high hopes he placed in this technique.

"All-Encompassing" signified an all-inclusive space, while "Seal" represented the pinnacle of sealing techniques.

Although it was still a prototype, Seimei believed it had the potential to become an S-rank sealing technique.

This wasn't arrogance—it was simply the truth.

The concept of the "All-Encompassing Seal" was to create a sealed space using the "Sealing Formation" as its foundation.

Then, he would use two combined "Four Symbols Seals" to form an "Eight Trigrams Sealing Technique" as the framework, reinforcing the space's stability.

Next, he would use the "Curse Seal of Self-Imprisonment" as a shackle to restrict the Tailed Beast's movement.

Finally, he would incorporate the "Guardian Sealing Technique" as an outer shell to isolate the interior from external interference, preventing chakra leakage while also protecting against outside intrusion.

Once complete, the "All-Encompassing Seal" would function as an inescapable prison.

However, since it was still just a prototype, it lacked stability. He needed to fully integrate the various sealing techniques to unlock its true potential.

This process would be incredibly difficult.

For most people, it would take years to accomplish.

But Seimei was different—he had the proficiency panel.

With a single thought, Seimei opened his panel and saw a newly added skill—All-Encompassing Seal: LV1 (1/200)!

That's right—the moment he imprinted the technique onto the panel, it was already at entry-level proficiency.

From here, he just needed to grind.

With the completion of "Eight Trigrams Sealing Technique," he had gained an additional 306,000 chakra points per day, plus the 4,000 saved from optimizing "Mystical Palm Technique," totaling 310,000 points.

Seimei planned to dedicate all of it to this technique to level it up as quickly as possible.

He estimated that reaching LV7 would be sufficient.

(To be continued...)