One unique aspect of the Spirit Transformation Technique is its perception capability. In soul form, the user can instantly sense a target's exact location and status, allowing them to fly directly to their position. It's a powerful support jutsu with incredible versatility.

In the original timeline, Kato Dan had used this very ability to break free from Kabuto's Impure World Reincarnation and rush to Tsunade's side, saving her life.

The true essence of the Spirit Transformation Technique lies in spiritual energy. And if one hopes to harness that power, they must first learn to master chakra itself—an intricate balance of physical and spiritual energy.

Spiritual energy is drawn from the soul, or more accurately, the will. The stronger the will, the more spiritual energy one can manifest.

That's why so many shinobi have risen against impossible odds in moments of desperation—it's not a miracle, but the pure surge of awakened willpower.

Among them, Kimimaro stood out. Even on the brink of death, crushed under Gaara's Sand Waterfall Funeral and buried 300 meters underground, he still burst out of the earth with terrifying strength. His sheer determination elevated his spirit, granting him strength far beyond his limits.

But Kaito was different.

He wasn't someone who found power only when cornered. Being a Transmigrator makes his soul stronger than most. Combined with his mastery over Sage Mode and electromagnetic induction, his spiritual strength had become something truly extraordinary.

And yet, there was a flaw—he had no proper method of fortifying it.

That's why he turned his attention to the Spirit Transformation Technique, hoping to refine his control over spiritual energy and make it usable in combat.

Chakra served as the bridge between spirit and matter, and by using it, spiritual presence could be shaped, controlled, and weaponized.

Sitting cross-legged, Kaito closed his eyes, tuning out the world as he let his chakra circulate naturally through his body. He searched inward—reaching for the subtle sensation of his spiritual energy.

Soon, he found it.

It was like a dense presence, similar to bloodlust or battle aura. Momentum, tension, killing intent—only deeper, more raw. He tried to focus it into a single point in front of him, aiming to manifest it into physical form.

An idea sparked suddenly.

What if I infused my spiritual energy into my Thunder Fruit abilities?

Not yet.

He decided first to solidify the soul, then modify it with lightning.

He began.

Years of refining his control came into play as he guided his spiritual energy into the shape of a humanoid form. But the sheer volume was overwhelming. If a normal soul was one unit, his felt like a hundred—an untapped ocean of potential.

Electromagnetic induction had been permanently active since the awakening of his Sage body, continuously enhancing his senses and his soul.

Once… twice…

He kept trying.

He had no idea how much time passed, but eventually, a faint figure formed in his mind—frail, aged, and barely holding together like mist in the wind.

Kaito opened his eyes with a long exhale. It was already nightfall. His original plan had been to enter the training space immediately after, but his stomach growled in protest.

Tsunade probably won't be back until she blows through every last ryo I gave her.

After grabbing a quick meal, he stepped into his training space and switched the environment to Shikkotsu Forest. The towering trees and thick fog were perfect for isolating his senses.

He resumed where he left off, focusing again on the flickering soul in his mind.

This time, he didn't force movement. He allowed it to passively absorb the spiritual energy surrounding it. Since they were born of the same essence, the process went smoothly.

The results were immediate.

The once-flickering image began to grow sharper, taking on clearer detail and becoming more solid with every passing second. Soon, a whirlpool formed, pulling spiritual energy from every direction like a starving beast.

Once the soul had devoured every trace of spiritual energy, it stood—fully formed, visible even within his inner world.

Kaito felt something shift. It was as if another layer of reality had opened up within his consciousness.

His electromagnetic induction expanded rapidly, pushing farther than ever before. It didn't stop until it doubled its previous limit.

He was stunned.

Before, his range only stretched as far as the outer edges of Konoha. Now, it extended far beyond. It was a monstrous leap in perception.

Opening his eyes, Kaito began forming hand seals as described in the scroll.

A moment later, his consciousness detached from his body and appeared high above in the sky. The furthest he could travel in this form was equal to the limit of his perception—a vast distance.

After circling for a moment, he returned to his physical form.

Interesting…

The chakra flow during this jutsu differed from traditional ninjutsu. Normally, chakra was pushed outward, projected from the body. But here, it collapsed inward, vanishing into his core. In his mindscape, it was easy to see: the chakra moved directly to the soul, unshackling it from the body.

It's like a key, he thought, releasing the chains that bind the soul to the flesh.

He shook his head. Enough theory.

He had successfully completed the first stage. Now came the second.

Lightning would train the soul.

Any shinobi who knew of his plan would be horrified. Lightning to enhance the body was extreme enough, but lightning to modify the soul? Madness.

And yet, Kaito didn't hesitate.

With a single thought, chakra infused with black and white lightning surged through his mind, targeting the spiritual form he had just forged.

CRACK!

The moment it struck, pain exploded through his consciousness like shrapnel. It felt like a thousand needles stabbing into his brain, an agonizing, electric pressure that crawled across his mind like fire ants.

"AHHH!!"

Kaito let out an uncontrollable roar as his body convulsed in Shikkotsu Forest, eyes bloodshot, veins bulging. He looked like a demon clawing through reality itself.

Half an hour passed.

When he finally couldn't take it anymore, he withdrew the lightning chakra from his mind, gasping for air. Sweat drenched him from head to toe, and he lay flat on the ground, chest heaving.

He looked as though he had barely escaped death.

But even through the pain, a grin crept across his face.

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