With a single thought, Seimei's palm conjured a "Rasengan."

Immediately, a surge of Wind Release chakra poured into it.

In no time, the Rasengan's shape changed, forming four spinning chakra blades around its periphery that rotated at an astonishing speed.

At the same time, a harsh screeching sound emanated from his palm, as if the surrounding air was being torn apart.

No, it wasn't just "as if"—the surrounding air was being torn apart.

The rapidly spinning wind blades shredded the air, producing a howling wind.

Standing there, Seimei's hair was blown into disarray, and even the skin on his cheeks stung faintly.

This wasn't just any jutsu; it was the S-rank Forbidden Technique—Wind Release: Rasenshuriken!

Seimei held the rotating, massive shuriken in his palm, carefully feeling its energy for a moment before attempting to throw it.

Unfortunately, he failed.

"As expected, it's still not possible," he murmured. Seimei pressed the Rasenshuriken against a nearby tree.

Even though he tried to suppress its power, the instant the Wind Release: Rasenshuriken made contact with the trunk, it shredded it to bits.

Not just fragments—dust.

The attack of the Wind Release: Rasenshuriken is at a cellular level. When the trunk disintegrated, it turned into powder that disappeared with a gust of wind.

Crack!

The tree's trunk shattered, and the upper half collapsed, crushing a large swath of flowers and smaller trees.

Simultaneously, Seimei activated Chakra Cloak and Earth Release: Hardening Technique, dashing out of the tree's falling range.

Landing again, he lifted his right arm.

Tiny beads of blood oozed from his skin.

Clearly, the side effects of the Wind Release: Rasenshuriken had not been overcome.

However, Seimei wasn't particularly disappointed.

After all, this was merely an upgrade to the Rasengan, not the Wind Release: Rasenshuriken itself. It was natural that the flaw remained unaddressed.

Its primary value was accelerating the growth of the Wind Release: Rasenshuriken.

The Wind Release: Rasenshuriken was originally developed by infusing Wind Release chakra into the Rasengan.

Now, with his Rasengan upgraded to its maximum potential, it naturally boosted this process.

Moreover, earlier in the day, he had perfected four other jutsu.

Among them, Wind Release: Vacuum Sphere, Wind Release: Vacuum Blade, and Wind Release: Wind Devourer were all Wind Release techniques of B-rank difficulty.

Perfecting these naturally enhanced his understanding and control over Wind chakra.

In other words, the two foundational elements of the Wind Release: Rasenshuriken had improved.

Thus, it was only logical that its proficiency growth rate had increased.

Based on his recent experience, Seimei estimated that in the future, he would need only about 100 chakra points to gain one proficiency point for the Wind Release: Rasenshuriken.

This chakra cost was a 50% reduction compared to before.

In essence, for the same chakra expenditure, his proficiency gain would increase by 50%.

This was undoubtedly a significant advancement.

Moreover, his current chakra reserves had expanded. After perfecting the Rasengan, he gained an additional 50,000 freely distributable chakra points daily.

Seimei planned to dedicate all of this extra chakra to practicing the Wind Release: Rasenshuriken.

With this added efficiency, he estimated he could gain approximately 1,590 proficiency points per day for the technique.

At this rate, even if leveling the Wind Release: Rasenshuriken from Lv8 to Lv9 required 50,000 proficiency points, it wouldn't take long.

"Phew—"

Exhaling softly, Seimei steadied his thoughts and opened his system panel, shifting his focus to Chakra Control.

The perfection of the Rasengan had not only accelerated the growth of the Wind Release: Rasenshuriken, but also significantly boosted his proficiency in Chakra Control.

His progress bar in Chakra Control was now nearly halfway through Lv6.

Of course, this progress wasn't solely due to the Rasengan. The perfection of the other four jutsu earlier in the day also contributed.

However, the Rasengan played the most critical role.

As the pinnacle of chakra form manipulation, its perfection brought immense changes.

While perfecting other jutsu might only enhance his control over specific chakra natures, the Rasengan improved his abilities across the board.

Enhanced Chakra Control meant he could now use less chakra to achieve greater effects with his jutsu.

It also made learning new techniques much easier.

Still, Seimei's primary focus wasn't on these aspects. What he cared about most was the ability to channel larger amounts of chakra at once.

Precise control allows for efficient chakra usage, but it has its limits.

In comparison, Seimei preferred the combat style of Uchiha Madara and Senju Hashirama—overwhelming opponents with sheer chakra volume.

Like his past battles, where he hurled massive fireballs from above, overwhelming his enemies.

Against such high-level techniques, no amount of precision could compensate without the right jutsu.

In essence, raw power trumps finesse.

Achieving this requires exceptional chakra control; otherwise, the backlash from incomplete techniques could be devastating. Seimei shuddered at the thought of a fireball exploding in his vicinity.

The increase in Chakra Control proficiency greatly enhanced his ability in this regard.

Seimei estimated that, at full power, he could now channel over 3,000 chakra points simultaneously.

Using this chakra to execute the Fire Release: Great Fireball Technique would result in a fireball with a diameter of at least 35 meters.

While this was only a five-meter increase compared to a few months ago, the volume increase was significant, which naturally amplified its power.

"'Fire Release: Great Fireball Technique'... This name feels a bit underwhelming," Seimei murmured.

However, after a moment's thought, he decided not to rename it.

Names are trivial. What truly matters is the effectiveness of the jutsu.

If its power is formidable enough, he could call it a "small fireball," and no one would dare underestimate it.

With these thoughts racing through his mind, Seimei shifted his focus to another skill—Chakra Absorption Technique.

Over the past few days, frequent battles had caused him to use this technique passively quite often.

During this time, he also experimented with refining it toward his intended goal.

The results?

Not bad.

With the proficiency system's assistance, its progress bar had advanced further, bringing it closer to reaching Lv7 perfection.

Seimei estimated that once it reached Lv7 (0/0) perfection and underwent another transformation, it would achieve his desired effect.

Closing the system panel, Seimei glanced at the sky.

Sensing the time was about right, he decided not to linger.

Forming seals with his hands, he consecutively activated Wind Release: Wind Wings and Chakra Cloak.

Once his body was fully enveloped, Seimei wasted no time. With a flap of the chakra wings on his back, he soared toward the camp at full speed.