Death: Starting as the Guardian of Avici Hell

It is a special existence that has broken through the boundaries of the Grim Reaper's soul to a certain extent, and can even actively enter a semi-hollow state.

In terms of strength alone, he is much stronger than the two captains who just took office.

It is also the most suitable material for conducting blurring experiments at present.

Soon, the newly formulated high-density liquid spiritual particles were injected into Umino Kumohei's body.

When all the parameters stabilized, the glowing Hōgyoku slowly landed on his forehead.

The next second, a powerful spiritual pressure suddenly erupted, instantly shattering the solid inner wall of the container and scattering countless tiny fragments outwards.

Aizen had anticipated this situation and was therefore unaffected.

They remained focused on observing the changes in the experimental subjects.

The spiritual pressure kept rising, as if there was no limit.

Spiral-shaped rays of light emanated outwards from Umino Kumohira, almost completely enveloping his body.

Naraku Sora looked at the scene before him, a thoughtful look flashing in his eyes.

He wasn't sure if it was just his imagination, but when Unno Kumohei began to blur, he seemed to hear the intro to the song "Brave Heart".

I have a feeling that something extraordinary is about to happen.

A large amount of white, viscous liquid seeped from Umino Kumohira's eyes, ears, nose, and mouth, instantly solidifying into a pure white, menacing mask.

It's like the Prajna in mythology.

The black and white in his eyes disappeared, replaced by golden vertical pupils, and a ferocious aura spread out, instantly enveloping the entire laboratory.

"Naraku, Naraku... Naraku is empty!"

His exposed teeth were misaligned, and wisps of white mist drifted out. A tangible light lingered around Umino Kumohira, wriggling as if it were alive.

"Damn you!!"

Although he had lost almost all his reason, he never forgot the person he hated most in his life.

That was Naraku Sora, who caused him to end up like this.

A surge of immense spiritual pressure erupted, transforming into a torrent that swept through the entire laboratory, instantly locking onto the young man standing in front.

"The material's physical characteristics are stabilizing and it will not collapse due to the surge in spiritual pressure in the short term."

"The boundaries of the soul were completely broken, but consciousness was basically lost, leaving only pure hatred."

Aizen calmly said while stabilizing the surrounding demonic barrier:

"Kong, although there is no relevant data, judging from the results, it was your presence that made this etherealization experiment a success."

"Like the virtual world, strong emotions are an indispensable part of breaking down the boundaries of the soul."

"Of course, the Hogyoku also needs further improvement, and this unstable factor needs to be completely eliminated."

Naraku grinned, looking quite pleased with himself.

Upon hearing this, Sousuke said that the experiment would not have been possible without him.

Indeed, he is the greatest sage in Soul Society.

"Haha, you flatter me."

Aizen: "?"

What's wrong with this guy again?

Just as the two were talking, Umino Kumohira's spiritual pressure reached its peak, causing the surrounding space to distort and the air to tremble violently.

They use irrational methods to gain several times or even ten times the power.

It's hard to say whether this deal is worthwhile or not.

But judging from Unno's expression, he seemed quite satisfied with his transformation.

Because, finally, they had the opportunity and the power to take revenge.

A violent surge of spiritual pressure erupted, and a blazing pillar of light shot straight up to the roof, crashing into the demonic barrier with a creaking sound that made one's teeth ache.

Feeling the quality of this spiritual pressure, Naraku Sora couldn't help but marvel.

Compared to the members of the Masked Army in my memory, Umino Kumohei in front of me could completely crush them.

I don't know if Aizen was taking special care of them, or if Kensei Muguruma and the others were just too weak.

In terms of spiritual pressure, the current captain of the Sixth Cart is barely even good enough to polish shoes.

Seeing that Unno Kumohira had broken free from the original Kido restraints and was rushing towards Naraku Sora without regard for anything else, Aizen frowned and was just about to unleash a burst of spiritual pressure when...

But someone beat them to it.

A cruel expression hung on Unno Kumohei's face as he raised his fist high, gathering all his spiritual pressure on it and unleashing a dazzling light.

Then, without hesitation, it crashed down towards the figure in front of it.

Feeling the strong wind rushing towards him, Nai Luo Kong did not retreat but advanced, his arms leaning back and his body making a sound like a bowstring being tightened.

The moment their fists collided, a deafening roar suddenly swept across the area.

The moment they touched, a terrifying force surged forth, starting from Umino Kumohira's arm and extending backward with devastating force.

Flesh, tendons, and bones all collapsed in an instant.

Half of his body exploded into a bloody mist, filling the laboratory.

Seeing that exaggerated scene, Aizen's eye twitched, and he gained a clearer understanding of Naraku's power once again.

I almost forgot.

In terms of spiritual pressure alone, this guy might be a little weaker than him, but you can't judge his true strength based solely on spiritual pressure.

This directly negated the conclusions he had reached through his research.

The battle of the god of death is the battle of Reiatsu.

However, upon closer examination, this guy doesn't seem to be a pure Grim Reaper.

Soon, a sharp friction sound rang out on Umino Yunping's body, the sound of bones and flesh growing together like the clashing of pig iron.

New internal organs and limbs grow from the mutilated body.

Hard chitinous bones emerged from beneath the flesh and covered the skin.

As the flesh and blood moved, a buffer layer was quickly formed between the exoskeleton and the skin.

His already imposing and tall body continued to expand, and in an instant, he transformed into a ferocious monster several meters tall.

"This level of super-fast regeneration is almost on par with Arturo."

Naraku Sora looked at the giant-like Unno Kumohira with some surprise, his surging spiritual pressure constantly surging around him with his breath.

"And they are very strong, probably with the capacity of dozens of vehicles."

The moment he finished speaking, Umino Unpei threw a heavy punch straight down.

Its purpose is to kill the man he remembers so vividly.

Feeling the intense pressure coming at him, Naraku grinned, then spread his arms and unleashed a torrent of fist shadows.

There were no fancy moves, just a pure burst of straight punches.

Torrential rain poured down!

In a fleeting moment, imperceptible to the naked eye, the giant's body, several meters tall, was hammered into a cloud of blood mist, as if it had been struck head-on by a fully-powered dump truck.

In an instant, his thick arms vanished, his chest caved in and collapsed, and most of his body was crushed into a bloody pulp.

If it weren't for the fact that Aizen might need to use it later, Naraku's fists would have landed on the head covered by the bone mask.

As one of the bosses in the deprecated version, Umino Kumohei was strengthened by being transformed into a Hollow.

However, compared to a certain player who is using cheats, he is still somewhat lagging behind in terms of skill level.

As Naraku stopped, Aizen stepped forward in perfect unison, unleashing several Binding Spells that broke the incantation, instantly imprisoning Unno Kumohira in place and even completely suppressing his super-speed regeneration.

After briefly checking his soul's state and confirming there were no unexpected issues, he looked at the guy next to him who seemed completely unaffected:

"It can be considered a success, albeit barely. There will be no soul suicide in the short term, and it will be sufficient for research and use for a long time to come."

"Kong, did you notice anything different during this experiment?"

Upon hearing this, Naraku rubbed his fingers together, recalling the feel of the blows he had just received. After a few seconds of thought, he realized:

"If I had to put it in a way, it's like stuffing the soul of a Hollow into the body of the Grim Reaper."

"Forcibly stitching two completely different things together."

"Although my strength has improved a lot, there's still a strange feeling about it."

As the first person in Soul Society history to achieve perfect Hollowfication, he has a lot to say on this matter.

Aizen looked thoughtful.

Although it lacks technical jargon, it still describes the crux of the problem simply and directly.

If the Hollowfication experiment were to actually implant the soul of a Great Hollow into the body of a Shinigami, what would be the final result?

Just as he was deep in thought, Naraku seemed to have thought of something and suddenly asked:

"Sousuke, could you give me a copy of the research materials on the Hogyoku?"

"The kind of defective product that's missing a piece here and a sentence there, preferably a document where even you can't tell the key points."

Aizen gave him a strange look: "Why are you looking at that kind of stuff? Aren't you afraid that knowledge will pollute your brain?"

"?"

Why does Sōsuke speak so rudely?

Ignoring the person who was about to go crazy, Aizen went straight to a corner of the laboratory and skillfully typed on the keyboard.

Soon, a thick stack of documents was ejected from the exit.

He casually pulled out a few cards and handed them directly to Naraku.

"These are some flawed ideas during the research process, but the overall direction has not deviated, and it should meet your so-called defective product criteria."

"You still haven't said what you need these things for?"