After completing his summary and planning for the future, Seimei wasted no time and immediately began his training.

He crossed his hands, forming the "Ren" seal, and directly performed the "Multi-Shadow Clone Technique."

Boom!

With a puff of chakra smoke, twelve figures appeared in the room.

Seimei looked at the shadow clones, nodded in satisfaction, and smoothly assigned them their training tasks.

Seven of the clones were sent farther away to practice large-scale techniques: Wind Style: Vacuum Sphere, Wind Style: Wind Devour, Wind Style: Rasenshuriken, Water Style: Exploding Water Colliding Wave, Water Style: Great Shark Bullet Technique, Fire Style: Fireball Technique, and Shuriken Shadow Clone Technique.

Three clones remained closer, focusing on smaller-scale techniques: Wind Style: Vacuum Blade, Rasengan, and Chakra Cloak.

The remaining two were assigned to research specialized techniques: one studied Chakra Absorption Technique, while the other worked on Shadow Blade Technique.

As for Guardian Seal and Sealing Array, both techniques had already completed their daily training requirements before Seimei's body transformation, so there was no need to allocate clones for those.

With this distribution, the only techniques left unaddressed were Lightning Style: Lightning Body Technique, Chakra Scalpel, and Delicate Extraction Technique.

However, Seimei had a plan. To conserve chakra, he always scheduled Multi-Shadow Clone Technique practice for times when his chakra levels were naturally low—usually in the evening.

Thus, for now, the only techniques he couldn't attend to were Lightning Body Technique, Chakra Scalpel, and Delicate Extraction Technique.

The first required his physical body for training, which was unrealistic given his current schedule. He was already devoting most of his time to practicing Palm Sage Technique and Heart Reflection Technique, leaving no extra time.

The latter two consumed too much chakra during practice, with slow improvement in proficiency. Seimei decided it would be more efficient to wait for an opportunity to use them practically, such as treating injured individuals.

These thoughts flashed through his mind as he dismissed the twelve clones and resumed his own training.

Over the following hours, Seimei maintained a cycle: every hour, he recalled all shadow clones, absorbed their experiences and memories, and converted the insights into skill proficiency. Then, he refreshed the clones to start anew with an improved foundation.

With each iteration, the proficiency of his skills visibly improved.

Three days passed in the blink of an eye.

By midday on the third day, Seimei absorbed the experiences and memories of the twelve clones as usual. However, instead of immediately creating new ones, he opened his eyes and seemed lost in thought.

Moments later, he stood up, drew his long blade with a clang, gripped it with both hands, and infused chakra into the blade. Then, he swung.

Swish!

Three blade shadows flashed through the air, leaving distinct marks in their wake.

These weren't mere illusions caused by Phantom Blade Technique, where only the target would perceive the shadows. These three blade shadows were tangible, visible to anyone, and radiated a clear energy wave in the air, demonstrating their physicality.

This wasn't a coincidence.

It was unclear whether this breakthrough stemmed from his mastery of Shuriken Shadow Clone Technique, which provided a solid foundation, or his culmination of multiple sword techniques at a perfect level. Perhaps it was both.

Regardless, within less than three days, Seimei had successfully developed his envisioned sword technique: Shadow Blade Technique!

"Status panel!"

With a thought, Seimei opened his proficiency panel.

There it was:

Shadow Blade Technique: Lv0 (30/100)

Looking at the skill, Seimei carefully reflected on the insights from the clone.

Based on his tests, the technique could unleash three tangible, simultaneous attacks.

Combined with Phantom Blade Technique, the mix of real and illusory strikes would undoubtedly create a "greater than the sum of its parts" effect.

Yet, Seimei frowned.

He adjusted his posture, gripped his blade, and swung again.

Swish! Swish! Swish!

Once again, three blade shadows flew forward.

But Seimei's expression remained unsatisfied.

The problem lay in the blade shadows' stiffness.

Even with Phantom Blade Technique, their rigidity limited their effectiveness. At best, they could serve as an unexpected finishing move, but they lacked the versatility to become a staple sword technique.

This was not Seimei's original intention.

His inspiration for this technique came from Moonlight Hayate's Dance of the Crescent Moon.

That technique allowed the user to attack from three different angles, a strategy that could pair excellently with Phantom Blade Technique.

However, Dance of the Crescent Moon required creating two shadow clones before execution.

For someone with limited chakra reserves, this wasn't a significant drawback. But for Seimei, with his vast chakra reserves, the trade-off felt inefficient.

Thus, he sought to develop a more flexible and less resource-intensive alternative.

However, if Shadow Blade Technique remained this rigid, he might as well stick to the high-cost Dance of the Crescent Moon.

Fortunately, the current technique was still in its infancy. It hadn't even reached the beginner level yet, leaving plenty of room for improvement. If refinement weren't possible, Seimei might have considered abandoning it—but he knew that was an impossibility.

As the saying goes, "The hardest part is the beginning."

Now that the groundwork was laid, Seimei was confident that, with the proficiency panel's assistance, he could quickly transform the technique into something practical and effective.

With this thought, Seimei's furrowed brows relaxed, and a slight smile appeared on his face.

After another moment of reflection, Seimei stopped dwelling on it. He sheathed his blade, performed the Multi-Shadow Clone Technique again, and created twelve clones.

Assigning them their respective tasks as usual, Seimei resumed his own training.

Given reports from other bases, it was clear that these peaceful days wouldn't last much longer.

Before long, they would be mobilized.

For now, he had to seize every moment to improve.