Crossover Anime: Starting with Bankai from Demon Slayer

Chapter 158 Youth and Strength Prevail

Aizen had seen Zanpakuto of the Biology Department before, but this was the first time he had ever heard of such a method.

Generally speaking, the Shikai of a Shinigami's Zanpakuto are primarily focused on combat abilities; even if a few are support or auxiliary, they wouldn't be considered such a minor aspect...

I never imagined that my original test subject would be eliminated in this way...

"It's really a roundabout way of coming back to you... Number 78..." Aizen muttered to himself.

"Spiritual insects?" Hitsugaya Toshiro, who was listening to the story, also showed a curious expression.

Matsumoto Rangiku felt a chill; she didn't particularly like insects. "I never imagined Shinobu-san's Shikai would be this kind of ability..."

"Yes." Haiyan bitterly recalled the strange sensation in her body that night: "Those worms could crawl in along the spiritual network, like scavengers, accurately identifying and devouring the parasitic remnants of the void."

Aizen took a sip of his tea and smiled, "Miss Butterfly is indeed a rare genius. Her ability to control spirit insects with such precision is probably something even the Technology Development Bureau would be interested in."

"Captain Aizen is joking. I don't think Miss Butterfly would like being stared at by those mad scientists," Kaien said with a smile, waving his hand.

Aizen smiled slightly: "I misspoke..."

"

Next, Aizen, Shiba Kaien, and Hitsugaya Toshiro discussed some topics related to team management, especially cross-departmental cooperation, and drafted a few simple proposals.

After leaving the 10th Division barracks, Aizen walked alone on a quiet path.

The gentle smile on his face didn't disappear, but the eyes hidden behind his glasses sent a chill down one's spine.

Metastacia was the name of his carefully cultivated experimental subject, a preliminary work for testing the Hollowfication process.

According to his calculations, that parasitism should be irreversible...

He was puzzled back then, how could the Fourth Division's medical expertise cure this mutation... This once made him doubt the results of the experiment.

"Time is such a complicated issue, number seventy-eight," he murmured to himself. "The little butterfly you brought back, the wings it flapped, are creating a storm in my world..."

"So today... the two girls Miss Butterfly sent to the True Spiritual Arts Academy, were they also guests from another world, like her...?"

Aizen pulled a neatly folded letter from his pocket.

That's something that happens every year; the Shinigami Academy sends out the course schedule for the year to all the instructors.

Aizen looked at his assigned lectures, his eyes gleaming: "Since I don't have much to do, I'll give a few more open lectures."

Summer passed by in a flash.

Although the original plan was to hone the skills for about a month, in fact, in order to achieve perfection, Asuka has been working hard for three whole months.

The training grounds in the basement of Urahara Store.

The air here has become almost viscous due to the recent continuous high-intensity spiritual pressure battles.

During those ninety days, the bird experienced more than just physical torment.

From initially being toyed with like a kitten by Yoruichi, to gradually being able to catch a glimpse of that black afterimage, and now...

His transformation is astonishing.

This change is not a sudden increase in the total amount of spiritual pressure, but rather a more condensed one.

At this moment, the bird stood quietly in the middle of the sandy plain.

He was shirtless, and every inch of his muscles looked like refined steel that had been forged through countless trials, with smooth lines and explosive power.

The anxiety and gloom that had arisen from the loss of power in his eyes had completely vanished.

A calm and composed demeanor, like the deep waters of an ancient pool, was suppressing his sharp edge.

He simply stood there, his breathing barely perceptible, his spiritual pressure tightly constricted within three inches of his body.

He was waiting.

Whoosh—!

A black shadow flashed by, so fast that it created a visual break.

Almost at the same moment, Yoruichi appeared to Asuka's left rear.

A slender hand, yet imbued with immense power, suddenly descended, aiming directly at the vital point on the back of the bird's neck!

According to the script from three months ago, Asuka should have been flipped over by this blow and rolled around on the ground a few times.

But now, things have changed.

The bird's ankle twisted subtly, and just before the palm strike touched its skin, it slid three inches to the side in a way that defied inertia.

"Hmm?" Yoruichi let out a soft "hmm," her offensive still unabated.

His right hand smoothly transformed from a palm into a hook, grabbing at the bird's shoulder once more.

"Hanging persimmons," Asuka said calmly.

He lowered his shoulders and elbows, and his left hand shot out with lightning speed, accurately blocking Yoruichi's wrist.

Using this as the main attack axis, he not only parried the claw attack, but also took the opportunity to throw a punch at Yoruichi, whose center was wide open!

"Good punch!" Ye Yi laughed.

This tactic is a stealth fighting technique used by covert mobile units, and Asuka has already mastered it.

But Shunshin is no ordinary person either.

She quickly adjusted her balance, swung her long leg, and kicked hard at the bird!

boom! !

The two men's fists and feet collided violently in mid-air, creating a visible ripple of spiritual pressure!

At the edge of the training field, several figures were watching the standoff ahead.

Wo Ling Tiezhai still had that serious look on his face, adjusting his glasses on the bridge of his nose, his huge body standing like an iron tower.

Beside him, Kurosaki Isshin was squatting on a rock in a nonchalant manner, holding a grass root he had gotten from somewhere in his mouth, but his eyes never left Asuka.

"Mr. Tessai, did you feel it?" Isshin suddenly spoke, his voice unusually low: "That kid's density."

"Yes, Mr. Kurosaki." Tessai nodded slightly, his voice deep and resonant: "Three months ago, his spiritual structure was stable, but it was like a piece of unforged pig iron. But now... that piece of iron is almost ready to be tempered."

Asuka used the combat pressure that Yoruichi brought her to continuously compress the density of her spiritual pressure.

Even though both are at the fourth level of spiritual power, his fourth level far surpasses that of ordinary people.

Isshin narrowed his eyes. As a former captain of the Shinigami, his insight was incredibly sharp: "He's turning his body into a Zanpakuto... With skills like that, even Captain Soi Fon could probably hold his own for a couple of rounds..."

"

Throughout the entire process, Kisuke Urahara remained silent.

"What am I going to do... I really can't control him anymore..." he thought to himself.

In the center of the battlefield, the two engaged in a frantic exchange of attacks within a small space.

Yoruichi's speed increased, and her afterimages almost overlapped, forming a black storm circle.

The bird at the eye of the storm is like a rock on the beach, unmoved by the pounding waves.

The bird's senses were pushed to their limit.

He sensed the tremors in Yoruichi's muscles and the movement of spiritual particles in the air.

He tried at first, but because of the significant difference in strength between him and Yoruichi, even with his senses fully activated, he was unable to detect Yoruichi's movements.

This long-lost sense of clarity is becoming increasingly clear as my spiritual pressure density increases.

"That's not enough, it needs to be even faster..."

Asuka's mind was free of distractions, filled only with an intense desire for battle.

Suddenly, the bird captured a fleeting moment.

When Yoruichi moves at high speed continuously, in order to maintain her balance, her spiritual pressure lingers for a moment longer when her left foot lands than when her right foot lands.

This is an opportunity!

The bird exerted force with its feet, and the rocks beneath its feet instantly turned to dust.

"A chaotic mess!"

He did not choose to back away from Yoruichi's successive kicks.

With the keen reflexes brought about by his clear perception, he acted like a drill, forcefully penetrating Yoruichi's leg wind.

His speed exploded to its limit in that instant, even producing a thunderous sound as it cut through the air.

Yoruichi's pupils suddenly contracted.

In her vision, the flying bird's powerful fist had transformed into five sharp energies, piercing straight into her chest.

This is a real threat.

In that instant, Yoruichi's physical instincts override her brain's commands.

Crack!

A wisp of golden light, as violent as thunder, flickered on Yoruichi's shoulder.

That was the prelude to the instantaneous activation; her spiritual pressure instantly materialized into a whirlwind, enveloping her entire body.

But just as the golden light was about to erupt completely, Yoruichi managed to suppress the impulse.

In the blink of an eye.

Yoruichi tapped his toe in mid-air, forcibly shifting his center of gravity, and his entire body slid backward in an arc, reaching a distance of over twenty meters.

The dust settled.

Yoruichi stood at a distance, her chest rising and falling slightly.

She glanced down at her right arm, where a shallow tear had appeared without her noticing.

Those were the marks left by the flying bird's fist wind.

Was he actually forced to react instinctively, subconsciously wanting to use all his strength to fight this brat? Yoruichi was startled.

In the distance, the bird still maintained that fist stance.

"Additional dish... three servings of Wagyu beef."

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