"This is what happened in Karakura Town."
Inside the First Division Barracks.
Shinji sat cross-legged on the ground.
Across from him, Captain Commander Yamamoto was brewing tea.
Kendo, tea ceremony, and calligraphy were all hobbies of Captain Commander Yamamoto.
"Simply put, you didn't find any information about Urahara Kisuke, right?" Captain Commander Yamamoto hummed, pushing two cups of tea towards Shinji and Kyoraku Shunsui.
"Urahara Kisuke seems to have set up a Barrier in the Human World, If we don't conduct a large-scale, comprehensive search without blind spots, we won't be able to find him." Shinji took a sip of tea, then shook his head and said.
A lie mixed with truth is the most perfect lie.
"If we let Shinigami conduct a large-scale search, the manpower and resources required would be too much, wouldn't they?" Kyoraku Shunsui scratched his head.
It wouldn't be difficult for Shinigami to thoroughly search the entire Aragai District from beginning to end.
But.
What was the point of ordinary Shinigami going when even Captain-level Shinigami couldn't detect the Barrier?
Even if they happened to stumble upon the vicinity of the Barrier, they wouldn't notice its existence and would just walk past Urahara Kisuke's face.
"It seems he has a perfect plan and isn't worried about us looking for him at all." Kyoraku Shunsui sighed, pointing to the seal Shinji had thrown on the ground "By the way, what's with the corpse inside?"
"That 8th espada named Szayelaporro, wasn't he killed by you once? How come another identical one appeared?" Kyoraku Shunsui scratched his head, looking bewildered.
Could it be that the Arrancar named Szayelaporro had a brother who looked exactly like him?
"I didn't kill Szayelaporro last time, Don't speak carelessly without proof." Shinji muttered, then said "This Arrancar, Szayelaporro, is a bit special, Like Twelfth Division Captain Mayuri Kurotsuchi, he has modified his own body."
"He even created things like clones and duplicates."
"What I brought back last time was one of his clones and duplicates."
"Including this time, I can't be sure if this is his true body, but I personally lean towards this still being one of his duplicates." Shinji concluded.
Hearing this, Kyoraku Shunsui gasped "He can actually duplicate himself? If he keeps duplicating himself, wouldn't that be.."
Shinji waved his hand, interrupting him "It's not that easy, His duplication or cloning should have great limitations, so there aren't many 'Szayelaporros' like this." Pointing to the seal in front of him, Shinji slowly said.
If he could clone and duplicate without limits, wouldn't that be incredible?
Then what would be the point of an Arrancar Legion? Szayelaporro alone could create an Espada clone army.
Clearly, this was unrealistic.
After reporting all matters.
Shinji called out to Nelliel, who was dozing off leaning against his back, then left the First Division Barracks.
Upon returning to the Kuchiki Clan.
Shinji found two sets of clothes that could cover the entire body, and took the two already impatient Arrancar, heading towards Mayuri Kurotsuchi's secret laboratory.
Using the method Mayuri Kurotsuchi had left behind.
Shinji entered the innermost core experimental area.
After waiting there for no more than ten minutes, Mayuri Kurotsuchi walked in with a sinister smile on his face.
"Hoho, the alarm here suddenly triggering really gave me a fright, So it's Captain Shinji."
"Is there something urgent?" Mayuri Kurotsuchi closed the door, immediately activating all the Barriers and traps outside the door, then suddenly frowned slightly, looking at the two figures behind Shinji, whose bodies were obscured by hoods.
Who were these two people?
"Take them off, Twelfth Division Captain and Head of the Research and Development Bureau Mayuri Kurotsuchi is one of us."
"Your experiment will proceed with his assistance and supervision." Upon receiving Shinji's command, Tier Harribel and Gantenbainne cast aside their hooded cloaks, revealing their Arrancar faces.
"Two Arrancar? And they're alive." Mayuri Kurotsuchi's pupils slightly contracted "Captain Shinji truly has a grand plan."
How exactly did Kuchiki Shinji manage to bring back two living Arrancar?
Could it be that they were also Nelliel's Subordinate Officials?
Thinking of this.
Mayuri Kurotsuchi looked at Nelliel suspiciously.
"They are not Nelliel's Subordinate Officials." Shinji saw what Mayuri Kurotsuchi was thinking and shook his head "They are just insurance in Nelliel's plan to evolve beyond Vasto Lorde."
"Cirucci Sanderwicci and Gantenbainne will take this risk first, undergoing the evolution experiment."
"If no problems arise during the evolution process, I will accelerate Nelliel's evolution, allowing her to break through in a short time."
Hollowfication and Arrancarization techniques were not achieved overnight.
Even Aizen, in his early Hollowfication and Arrancarization experiments, had many failed cases.
Wasn't Cirucci a failed experiment?
The Espada who appeared after her all displayed more powerful spiritual pressure than her.
Therefore, Shinji was very cautious about Nelliel's evolution.
"It seems Captain Shinji has considered everything thoroughly, What do you need me to do?" Mayuri Kurotsuchi almost couldn't stop himself from asking directly after hearing that.
"Here."
Shinji tossed out a glass vessel, about ten centimeters long, with a light blue substance flowing inside.
It was very thin, yet filled with a mysterious light.
"This is.." Mayuri's eyes flickered.
Even Cirucci and Gantenbainne couldn't help but look over.
Their breathing seemed to become heavy and rapid.
Even without it being activated, they both still felt that temptation, the temptation of evolution!
Using the substance in that glass vessel, they could restart evolution!
"This is the key substance that allows Hollows to continue evolving."
Shinji glanced at them, ignoring them, and continued, "Injecting the substance inside into the body will initiate evolution, but the consequences of evolution are currently unknown, as there is no mature data to indicate them."
"In other words, the risk is unknown." Of course, Shinji couldn't display the power of the Hōgyoku in front of them.
He could trust Nelliel, but he absolutely couldn't trust those in front of him.
So.
Shinji infused some of the Hōgyoku's power into a solution, the substance in the glass vessel in Mayuri's hand now contained the power to evolve Hollows.
"Hoho, I never expected that I would have a day to preside over such an experiment."
"An experiment on the evolution of an Adjuchas-class Menos Grande."
"If this succeed, they will evolve into Vasto Lorde, won't they?" Mayuri licked his dry lips, his eyes burning with fanaticism.
He walked to the front, pulled out an experimental operating table, and then asked with a playful look "Two Adjuchas, which one of you wants to be experimented on first?"
"Me, let me go first." With almost no hesitation, Cirucci stepped forward first.
Her eyes were firm, also carrying a hint of fanaticism and excitement, and she actively lay down on the experimental operating table without Mayuri even needing to remind her.
"I Never experimented on something with unknown risks."
"That means there's a fifty percent chance of failure."
"But there's also a fifty percent chance of success!"
Cirucci closed her eyes, waiting quietly.
"What excellent conviction, maintain that conviction, it will give you a higher chance of surviving the experiment." Mayuri chuckled sinisterly.
He walked to the table where items were stored, and used a syringe to draw all the liquid from the glass vessel in his hand.
Using various instruments, after a few minutes of observation, he recorded a large amount of data displayed by this substance.
Then, Mayuri, holding the syringe, walked to the experimental operating table and plunged it into Tier Harribel's arm.
Sizzle!
A shower of sparks flew, followed by a scalp-numbing metallic grinding sound.
The needle on the syringe was directly bent beyond recognition.
And on her arm, not even a mark was left.
Shinji, who had been watching: "..."
Cirucci, who opened her eyes: "..."
Gantenbainne, whose heart was tense: "..."
Nelliel, whose eyes were only on Shinji "Meow meow meow???"
In awkward silence.
Mayuri silently took away the syringe, turned his back, and fiddled with something on the experimental table again.
About half a minute later, he walked back with a new syringe.
Standing in front of Cirucci.
"Hoho, I apologize, because I was too excited, it's my first time presiding over such an experiment, and also my first time encountering a live Arrancar as a test subject."
"I actually forgot that Arrancar all possess the skill of Hierro."
"Now, I won't make such a foolish mistake again." Mayuri smiled, his eyes dark, and forcefully plunged the syringe down.
This time.
The syringe penetrated the Hierro defense without any obstruction.
The Arrancar in front of him clearly offered no resistance and cooperated very well with the experiment.
Under these circumstances, as the mad scientist he had too many ways to break through the Hierro's defense and inject the substance from the syringe into Tier Harribel's body.
Soon, as he pushed, a full syringe of light blue substance was entirely injected into Tier Harribel's body.
"Do you feel anything?" Mayuri adjusted the instruments, began to observe the changes in Tier Harribel's cells, and at the same time picked up a stack of paper, recording various data.
All the current data was exceptionally precious.
Even the slightest change had to be precisely recorded, not to be missed.
"Feelings.. I don't have any obvious feelings right now."
She hesitated for a few seconds and said "It's some subtle feelings.."
"My body temperature seems to be rising, although the increase isn't very high, it is indeed rising, and my heart rate has also started to accelerate, about one-tenth faster than before."
"Additionally, I seem a bit sleepy, as if I'm already very tired."
"Is this a good change?" She looked at Mayuri.
"This indicates that you are indeed starting to change, which is a very good beginning."
"Generally speaking, the cellular structure of a Menos Grande is very stable, like a machine, they don't feel fatigue, with almost endless power."
"As for drowsiness? For an Adjuchas-class Menos Grande, it's even more absurd."
Mayuri watched the magnified cells, slowly saying with some surprise, "All this indicates.."
"After Captain Shinji's substance was injected into your body, your cells began to mutate."
"Due to insufficient data, I currently cannot determine whether this mutation is good or bad."
"However, your cells are indeed changing."
"Newborn cells and the cells within your body are undergoing initial fusion, so currently, not too many abnormalities have manifested, only making you slightly aware of subtle changes in your body."
"Once the fusion deepens further, you should have more distinct sensations."Mayuri murmured excitedly.
Was this Arrancar named Cirucci Sanderwicci truly evolving towards a Vasto Lorde under his gaze?
If the substance provided by Shinji could truly help Hollows break through their limits and evolve.
Then perhaps.
Nelliel might really become the first Hollow to evolve beyond the Vasto Lorde!
Looking at the cells that were slowly fusing, seemingly undergoing some changes, and continuously generating new spiritual pressure.
Mayuri felt somewhat restless.
In this situation, of course he would be nervous.
This would be an experiment recorded in the history of Soul Society in front of this experiment, what was Urahara Kisuke?
But more than that, it was impatience.
Mayuri wanted to quickly see the results of the experiment, to see what Cirucci would ultimately evolve into.
However, this required waiting.
And an excellent science, I must possess good patience, capable of enduring the torment of time.
Although Mayuri was a madman, his patience was actually quite good.
"What's the situation now?" Shinji didn't want to understand what those technical terms meant, and asked simply and clearly.
With Mayuri, a professional, here, Shinji had a quicker way to obtain information.
"Currently, the start of the experiment is very successful, but to see subsequent changes, it will take three to five days to have clear data support."
"Captain Shinji, let's just wait quietly."
"Thank you very much for entrusting me to preside over an experiment of this caliber." Mayuri chuckled, sounding a bit unsettling, so Shinji made him shut his mouth directly.
"Stop that unsettling laugh of yours, If I hear it again, you won't be part of this experiment." Shinji glanced at him, saying words that made Mayuri's face change drastically.
Mayuri Kurotsuchi: "..."
I just smiled what did I do wrong!
"Three to five days.. Then let me see the progress, to what extent can it evolve." Shinji glanced at Nelliel, pulled over a sunken chair, and sat down with Nelliel in his arms.
"Cirucci Sanderwicci, you must succeed." Shinji said.
Cirucci Sanderwicci's Vasto Lorde-class power would be secondary
What was important was..
If She evolved successfully, and the entire process had no issues, with her appearance also not alienating, then it would mean the feasibility of this experiment, and with almost no risk.
Thinking of this, Shinji took a deep breath and slowly closed his eyes.