The Ōken!
It was not the first time Grimmjow had heard this term.
As one of the Espadas, he also knew at least a part about Aizen's purpose.
The reason for the decisive battle between Aizen and the Soul Society was that he wanted to use the Karakura Town of the world of living, which was a Jūreichi (Concentrated Spirit Zone), to create the Ōken.
Although he doesn't know what the Ōken is, it could be seen that this thing was something important from the fact that Aizen wanted to create this thing, and the shinigami were fighting him to stop him from obtaining it.
As for Sojiro, he had never heard of Ōken before. After all, he had never even heard of Zero Division, so it would naturally be difficult for him to know about Ōken.
However, according to Mazuru's statement, creating the Ōken seemed to require a lot of souls.
Sojiro didn't know that creating the Ōken not only needed souls, but also a Jūreichi.
There were conditions that needed to be met in order to create the Ōken – hundred thousand souls and a Jūreichi with a radius of one spiritual ri (usually about one third of an English mile and now has a standardized length of a half-kilometer (500 meters or 1,640 feet or 0.311 miles)).
The so-called Jūreichi refers to the point in the Human World that possesses the greatest concentration of spiritual beings. That place would move with the times, and Karakura Town, which was referred to as District 3600 by the shinigami, was situated on the current Jūreichi.
This was why the Soul Society determined Karakura Town as the location of the decisive battle and moved it after confirming Aizen's purpose.
But as fate would have it, the decisive battle between Aizen and the Soul Society was not over yet, but Mazuru sneaked into the Soul Society, and was about to create the Ōken, which Aizen dreamed of.
Of course, Mazuru was not sure whether Ōken could be created by his method, but right now the real Karakura Town was in Soul Society, if there was a chance, it was now and Mazuru was ready to try.
Of course, for the first condition for creating Ōken, one-hundred thousand souls, he does not intend to use the souls of human beings of the world of living.
Even if some human beings with spiritual power were occasionally born in the Jūreichi, and they come to the Soul Society after death, at most they only have the possibility of becoming a shinigami. Among the one-hundred thousand souls, most of them were ordinary human souls.
For such ordinary soul, even if there were one-hundred thousand of them, in terms of quality, it was not even as good as a noble born with high amounts of reiatsu.
After all, they were nobles, as one of the founders of the Three Realms, there were still some distinctive powers left in his blood.
This was also the reason why there could be born shinigami among them from generation to generation and they could live in Seireitei all the time, instead of staying outside Seireitei like ordinary souls who couldn't bear the concentration of reishi in the air and their lifespan gets greatly damaged, and then they eventually die a premature death.
Byakuya's wife, Hisana, died because she could not bear the strong reishi in the air of Seireitei.
…
The blood-red barrier instantly spread, centered on Mazuru, and then covered most of the Noble Street.
In Noble Street, some nobles who were having fun in their mansions soon discovered that the world had undergone some changes and turned crimson.
"This is…?"
This strange change immediately attracted the attention of many nobles.
Not long after that, they discovered that an old man in one of the clans had died strangely, which immediately caused panic among many nobles.
With the blood mist, the first nobleman died, and soon, more nobles died one after another.
Although they were all nobles, the person who was manipulating the Bankai was Mazuru after all, even if the nobles were sentenced to death, he still had tendencies to spare some.
For example, some nobles he was familiar with, such Shunsui, Jushiro, and the families of Byakuya, Yoruichi and others, he did not made much moves on them.
Most of his targets were noble clans that had committed certain crimes by relying on its noble status.
As for how to determine that the family committed a crime?
Quite simply, he got it all from Central 46.
The souls of the previous batch of Central 46 people had been imprisoned by him in the sea of blood for a long time. Sometimes when there was nothing to do, Mazuru liked to pull their souls out for a trial.
After all, Central 46 had always liked to judge others, convict them, and frame them, so even if it's just their imprisoned souls that Mazuru was judging, the feeling was really different.
And so whether a certain noble committed a crime, and whether they had covered-up for that noble, he couldn't be clearer.
As for the souls of this batch of Central 46, although they were also in his hands, after all, this batch had only been in office for a short time, and they haven't even enjoyed the power of Central 46, so Mazuru didn't bother to interrogate them.
The information extracted from the souls of the previous batch of Central 46 members earlier made Mazuru sneer at the group of nobles. It was too much to write down, and it would not be an exaggeration to say that the crimes they committed abusing their powers, were endless.
Central 46's protection of the nobles was not as simple as preventing Yamamoto from investigating the Kasumioji family and allowing Tokinada, who killed his wife, to go scot-free.
Almost any matter involving the nobles, they would either turn it into a big deal or turn into a trivial matter depending on their interests.
It was also after knowing what they were doing that Mazuru couldn't help but think of Kuchiki Koga.
This guy was downright unlucky.
Obviously, he could be released without any incidents back then after being locked up in the Repentance Palace for a few days.
After all, the status of the Kuchiki family was there, but because he couldn't bear the anger in his heart, he decided to escape prison on his own initiative, and then for the glory of the nobles, Ginrei had to deal with Koga himself.
So in the final analysis, Koga didn't know how powerful his father-in-law was, and misjudged the strength of the Kuchiki family.
In the crimson barrier that enveloped most of the Noble Street, all the nobles who committed crimes died one after another, it was not an action against individuals, but rather against their whole families.
Although there might be some people among them who never needed to abuse power, but they still enjoyed the status brought by the abused power. So they were also tied with their families and naturally had to pay for it.
One after another, souls gathered towards Mazuru, and Sojiro and Grimmjow also noticed this phenomenon. Grimmjow was a little surprised, it was the first time he saw Mazuru's Bankai.
Sojiro, on the other hand, looked terrified.
Mazuru had never shown such a strange ability in the battle in Las Noches before.
'There is still more to his Zanpakuto's abilities than previously shown?'
"In your opinion, what is the essence of a shinigami's power?" Mazuru glanced at Sojiro with a look as if knowing what he was thinking, and asked an inexplicable question.
Sojiro was stumped with the question and remained silent.
Mazuru asked himself and answered, "It's the soul. My Zanpakuto utilizes that same very power."
Mazuru's sword was actually a Zanpakuto with the soul-system in its essence.
*****
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