The Evolving Evil Spirit

"Konoha..."

Sarutobi Hiruzen ignited with a dazzling blue chakra, the power granted by the energy imbuing his aging body with astonishing explosive force.

"Strong Fist Whirlwind!"

"Bang!"

The demon hunched over, struck squarely in the abdomen, and was sent flying back at an incredible speed.

It rolled across the flat ground for dozens of meters before finally coming to a stop.

"Cough, cough..."

"Human..."

The demon spat out blood, staring at the old man before it in utter astonishment.

"How are you capable of this?!"

"Such power..."

"Are you a demon too?!"

The fact that a human's strength could actually surpass its own filled it with immense terror; this was completely different from the scenes of slaughtering humans it was accustomed to.

Sarutobi Hiruzen had no intention of conversing with such a monster, instead quietly observing the demon's high-speed recovery process.

That previous Konoha Whirlwind had shattered the demon's spine right through its soft abdomen.

Yet, in the time it took for the demon to speak, its bones had begun to squirm in a grotesque fashion, and in just a few moments, an injury that would be impossible for a human to heal had completely mended.

"Old man."

"The way you don't say a word..."

"You look a lot like those guys who specialize in killing demons..."

"But you're not having very good luck today..."

The demon slowly stood up. After its spine recovered, its bones did not stop shifting; as the skin on its back heaved, it seemed as though something was about to sprout out.

"I've eaten so many people today!"

"My power..."

"It's about to burst out!!!"

Sarutobi Hiruzen's eyes shifted slightly.

"Able to evolve by eating humans."

"Combined with super-strong physical functions and regenerative abilities."

"So this is what the term 'immortality' means in this world..."

Seeing this, Sarutobi Hiruzen could not help but look on with a hint of disgust.

If this was what immortality entailed, he would rather not have it.

Not to mention the side effects and prospects of becoming a demon, the mere act of eating humans made Sarutobi Hiruzen feel nauseated.

Under Sarutobi Hiruzen's disdainful gaze, the demon's back continued to swell, sprouting a pair of extra, hideous arms covered in bone spurs.

"To be able to witness my evolution..."

"You should feel honored, human!"

The demon's ferocious face twisted once more, its mouth stretching almost to its ears, its pupils contracting to the limit.

Immediately after, the four arms grew out frantically, slicing through the air at high speed as they attacked Sarutobi Hiruzen.

Although Sarutobi Hiruzen displayed a flexibility that belied his appearance, dodging the attacks from all sides in mid-air with an extremely agile posture, He could have easily evaded them, but for a certain purpose, he intentionally delayed his movements for a split second.

The demon's arm circled in the air, its sharp claws slicing open Sarutobi Hiruzen's arm and scattering droplets of blood.

"Slurp."

The demon retracted its elongated arm and licked the blood from its fingers.

"Hm?!"

The demon looked as if it had tasted something peerlessly delicious, its expression becoming visibly excited.

"I must have it."

"I must have you!"

"What a delicious body!!"

Letting out a cry that sounded like a mix of laughter and weeping, the demon's figure turned into a blur, approaching Sarutobi Hiruzen's position at a speed almost impossible to track.

Its four arms spread out like a spider hunting prey, completely sealing off Sarutobi Hiruzen's retreat.

"Able to evolve extra organs..."

"And extremely interested in a body containing chakra, are you..."

Sarutobi Hiruzen faced the ferocious demon, his mind calmly analyzing every piece of intelligence he had gathered regarding the creature.

"After consuming a massive amount of flesh and blood..."

"In terms of taijutsu, it can reach a level approaching that of a jonin..."

"Even its regenerative abilities and vitality are at an inhuman level."

"However."

Sarutobi Hiruzen looked at the hideous face of the demon, now mere inches away, with a calm expression.

"Compared to a ninja, its combat methods are still too singular..."

Amidst the demon's excited expression, its sharp claws pierced straight through Sarutobi Hiruzen's chest.

"Hm?!"

The demon froze on the spot; this did not feel like piercing through flesh at all, and not even a single drop of blood flowed out.

"Earth Release: Earth Clone Technique."

Sarutobi Hiruzen's steady voice drifted over, and the Sarutobi Hiruzen in front of the demon dissolved into a puddle of mud that splashed everywhere.

Immediately after, the demon felt an irresistible gravitational force beneath its feet, dragging its body straight down.

The ground acted like flowing water, completely enveloping the demon's body.

In its place, Sarutobi Hiruzen's true form slowly rose from the ground.

"Earth Release: Double Suicide Decapitation Technique..."

Sarutobi Hiruzen said, looking at the demon's head as it struggled incessantly in the ground.

"It's useless."

"I specifically used the Hardening Technique to reinforce the ground around you..."

"With the strength of granite..."

"Even if you evolve a few more times, you won't be able to break free..."

This is the reason why ninjutsu reigns supreme in the ninja world, while taijutsu is merely an accessory.

Because as long as one's proficiency in nature transformation is high and profound, or one learns secret techniques, the power of ninjutsu can be easily elevated to a level that even scientists would find breathtaking.

Physical strength, however, has its limits and requires an extremely long time to train.

As the Professor of Ninjutsu, Sarutobi Hiruzen had countless ways to toy with a purely physical fighter until they died.

"So then..."

Sarutobi Hiruzen looked down at the demon's hideous, roaring face beneath his feet.

"Bang!"

With a powerful kick, the demon's head exploded like a watermelon hitting the ground.

However, the shattered fragments of the head did not die; instead, they moved as if they had a life of their own, drawing back toward the body buried deep underground.

In just a few dozen seconds, the demon that had been head-shotted had already restored itself to its original state.

With the mindset of a researcher, Sarutobi Hiruzen proceeded to use four other nature transformations, aside from Earth Release, to destroy the demon's body one by one.

In the end, other than Fire Release causing the demon to scream for a slightly longer time, it didn't have much effect.

The demon eventually acted as if nothing had happened, recovering from its injuries at an extremely fast speed.

Ignoring the demon's frantic clamoring, Sarutobi Hiruzen sighed.

"What terrifying vitality."

"Even a man-eating demon of this level can achieve near-immortal vitality."

"Most so-called vampires probably couldn't even reach this level."

"It seems the transmigrator entry I chose was truly the right one."

"With such powerful survivability, immortality is merely an added bonus."

Sarutobi Hiruzen crouched down and looked at the demon before him.

"So, tell me... who created a monster like you?"

But the answer Sarutobi Hiruzen received was a barrage of vicious curses and clamoring.

"You old bastard*****!!!"

"**kill"

Sarutobi Hiruzen's expression remained unchanged as he formed a seal with one hand.

"It seems you are the type who won't shed tears until you see the coffin."

"Wind Release: Wind Blade!"

A sharp blade of air whistled out, but it was not aimed at the demon.

Instead, it was aimed at the dense vegetation above the valley.

The Wind Blade whistled past, carving a gap through the thick trees in the valley.

The sunlight from above shone perfectly through the gap, illuminating the demon's head.

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