Training in Sage Mode

Natsu glanced down at it, then reached out and ruffled its head. "Thanks, you were a great help."

The little fox couldn't understand, but it could sense the hint of approval in its owner's tone.

Its tail immediately stood up, twirled happily around Natsu's wrist several times, then curled into a fluffy ball, nestled contentedly in his palm and began to purr.

Natsu's consciousness withdrew from her body, and she slowly opened her eyes.

The crimson Sharingan spun in its sockets, the three Tomoe rotating almost twice as fast as usual.

He looked down at his palm, where the little fox was still curled up, its fluffy tail covering its nose, sleeping soundly with a soft snoring sound coming from its throat.

He silently reviewed the information he had just received from beginning to end.

Susanoo is Guardian Spirit of souls.

The core of Senjutsu is to have Susanoo refine Natural Energy on its behalf, and then feed it back to the host through a soul link.

The threshold is not Mangekyo Sharingan, but Susanoo.

This means that any member of the Uchiha Clan who can evolve their Sharingan to the point where Susanoo —regardless of whether they have the Mangekyo Sharingan —is qualified to cultivate this Senjutsu.

At its peak, Susanoo can reach a thousand meters in length, making one's strength comparable to that of the Six Paths.

A complete and clear path of evolution, from beginner to expert, was laid out before him.

It's not the life-or-death gamble of the Ninja World, where hatred and pain lead to the acquisition of the Mangekyo Sharingan, nor is it the cruel fate of glimpsing eternity through the transplantation of a loved one's eyes. Instead, it's a path to heaven that can be passed down from generation to generation, where every step is taken with solid steps.

Natsu remained silent for a while, then extended a finger and gently poked the little fox's ear.

The little fox's ears twitched, but it didn't wake up.

"I should give you a name," Natsu muttered to herself, looking at the little creature that was fast asleep.

He looked up and glanced at the horizon where the sea met the sky, the sea breeze making his robes flutter.

He recalled an ancient sword he had seen in a museum in his previous life— Kunwu.

That was a divine weapon from ancient China legends, capable of cutting through iron like mud and slicing through gold and jade; its name carried a fierce and indomitable spirit.

And isn't this fox spirit, who can only inherit Sage Mode, precisely the sharpest blade the Uchiha Clan will ever use?

"Let's call him Kunwu." He poked the little fox's nose; it felt cool and damp.

The little fox—who should be called Kunwu now—sneezed groggily, rubbed its nose with its paw, turned over, and continued sleeping.

Natsu ignored it. He placed Kunwu back into the warm, golden space of consciousness within his body, then closed his eyes again.

Cultivation is something that should be done sooner rather than later.

According to the fragments of memory transmitted by Kunwu, the training of Uchiha Sage Mode is divided into three steps.

The first step is to summon Susanoo and put it in a semi-activated state between reality and illusion—not the complete form that stands tall and imposing during battle, but only a thin layer of Chakra Cloak as thin as a cicada's wing, attached to the practitioner's body.

This step requires extremely high precision in Chakra control, but Natsu has no shortage of Chakra control.

The second step is to introduce the Natural Energy that exists freely between heaven and earth into this Chakra Cloak.

The danger of this step lies in the fact that Natural Energy is violent and difficult to tame before it is refined, and the slightest carelessness can cause it to turn around and erode the cultivator himself.

However, as Guardian Spirit of souls, Susanoo is Susanoo capable of filtering and buffering, minimizing the destructive power of Natural Energy.

This is much safer than the regular Sage Mode.

The third step, and the longest one, is when Susanoo absorbs Natural Energy and then feeds back the refined portion to its host through a soul link. Like a trickle flowing into a river, it washes over and reshapes the host's body and soul day after day.

Natsu sat cross-legged on the reef, her hands Hand Seals.

Dark golden Chakra emerged from his body, not with the overwhelming burst of power during battle, but like a warm, gentle film of light, flowing slowly along his skin.

He could clearly sense the presence of Susanoo —not as a weapon, but as a conscious Guardian Spirit connected to his soul.

It emitted a very low hum deep within him, as if responding to his call.

Then he opened the door.

Natural Energy surged into Susanoo Chakra Cloak like a tidal wave, feeling like opening a window in a storm—the gale-force winds and icy raindrops pounding on your face, surging, violent, and carrying a primal, wild power.

But Susanoo caught them steadily.

The layer of dark golden light began to slowly swirl, like a miniature Uzumaki, gradually absorbing, taming, and refining the chaotic Natural Energy.

After an unknown amount of time, the first wisp of refined Natural Energy entered his body through the soul link.

The sensation was extremely subtle—like a snowflake falling on warm skin, melting into a water droplet before you could even feel the coolness.

But his Sharingan detected the change.

His pupil power increased by an extremely small amount in that instant.

Natsu smiled silently to herself.

It seems this Senjutsu is even more useful than he imagined.

After an unknown amount of time, Natsu slowly finished her practice and exhaled a breath of stale air.

The dark gold Chakra Cloak receded back into his body like a tide, and the sea breeze once again filled his robes, carrying a hint of coolness.

He looked down at the back of his hand; a few lingering reddish-gold lines remained on the skin, slowly fading beneath.

efficient.

Although the amount of Natural Energy refined during the first cultivation is negligible and its effect on pupil power is almost insignificant, the difference between being effective and ineffective is like heaven and earth.

As long as the direction is right, the rest is just a matter of time.

He planned to teach this Senjutsu to Fugaku after returning to Origin Island —his uncle had already reached the threshold of Super-Kage Level level after receiving Hashirama Cells, and Susanoo for a long time, making him the most suitable candidate for the first batch of trainees.

He would then compile his insights and experiences from his cultivation process into scrolls and leave them in a secret room at the Naka Shrine.

From now on, anyone in the clan who has awakened Susanoo, whether it's the Mangekyo Sharingan or the Three Tomoe Sharingan, can learn it on their own once they get the scroll.

However, thinking of this, Natsu Yin frowned slightly.

Mangekyo Sharingan.

He leaned against the rocks, his fingers tapping unconsciously on his knees, unusually agitated.

According to his original estimate, after obtaining the complete Sage Body, the power of Indra's Eye would complement the Sage Body, and the Mangekyo Sharingan would naturally open within a month at most.