Time passed quickly, and a month passed in a flash. Finally, Nightmare Soul Society's operation to capture Aizen and the other two began.
The person in charge of this operation wasn't Captain Yamamoto, because he was also responsible for guarding Nightmare Soul Society's headquarters.
Therefore, this responsibility was handed over to Shunsui Jingle, the captain of the Eighth Division, because he was the best candidate to replace Captain Yamamoto in Nightmare Soul Society.
Not only because he had been the captain for hundreds of years, but also because he was a reliable and cautious person.
In addition, his strength and wisdom were not ordinary, so everyone agreed that he would be the overall person in charge.
After all the members were ready, Nightmare Soul Society officially opened the Black Chamber to Hueco Mundo.
Under normal circumstances, it was almost impossible to reach Hueco Mundo from Soul Society, but this impossibility was made unprecedented progress with the breakthroughs of the Technology Development Bureau.
This passage called the Black Chamber was the passage connecting Soul Society and Hueco Mundo. Moreover, this developed passage was very sturdy. It was only after repeated experiments that it was put into regular use.
The most important thing was that, with the passage of time, the Black Chamber's accuracy had improved, and it could clearly determine the location of entering Hueco Mundo within one kilometer.
This small error was nothing to the huge Hueco Mundo, so the Shinigami didn't have to worry about rashly entering the center of Hueco Mundo.
In this way, a group of people embarked on the journey to Hueco Mundo. After spending some time in the Black Chamber, everyone arrived at their destination.
The scene in front of them was completely desolate. Here, only endless sand dunes could be seen, and there were no buildings at all.
And because the Shinigami came to the edge of Hueco Mundo, there wasn't even a single living creature here.
"They're here." In the center of Hueco Mundo, there was a huge palace-like building here.
Inside the palace, the three people in the center were Aizen, Ichimaru, and East Sensei. The three of them were sitting in this hall.
The one who spoke was Ichimaru Gin. He had already seen the scene of the Shinigami coming here from the surveillance equipment in Hueco Mundo.
This kind of surveillance equipment was something that even Nightmare Soul Society didn't have, and this kind of equipment couldn't be discovered under normal circumstances.
This was because they were located in the sky above Hueco Mundo. Countless surveillance devices could clearly show every corner of Hueco Mundo.
As soon as the Grim Reapers stepped into Hueco Mundo, they were directly under the surveillance of Aizen and the others. Before the battle even began, they had already fallen into a passive state.
"Do we need to do anything?"
Tōsenyō also asked, and the person he was asking was naturally the leader of Aizen, Yamaguchi.
Aizen rested his chin on his right hand. Judging from his eyes, he didn't seem to care about the Grim Reapers that were chasing after him.
"They probably want to let some small fries play with them. We're not in a hurry to make a move," Aizen said calmly.
He was now the king of Hueco Mundo. He ruled over all the Voids here, including the three levels of Great Voids. They were all his subordinates.
As for the matter of Aizen becoming the King of Hueco Mundo, it had to be traced back to a hundred years ago.
At that time, Aizen was already the deputy captain of the fifth division, but he didn't want to just be a deputy captain.
In his heart, even the position of captain could not satisfy his ambition. He had absolute confidence in himself.
He believed that he should be the ruler of all creatures. Whether it was the souls of Soul Society, the Voids of Hueco Mundo, or even the humans in the modern world, they all had to listen to his orders.
With such great ambition, Aizen also began to prepare his plan, a crazy plan.
Because he had such high intelligence, he wanted to develop a weapon that could help him dominate the world.
After more than ten years of research, Aizen finally succeeded in developing an object that contained a huge amount of energy.
This object was the most primitive Banyu that Aizen spontaneously developed. However, although the Banyu was developed by Aizen, he found that the Banyu he developed had a huge flaw.
Although it contained a huge amount of energy, this energy couldn't be successfully used by him. Instead, he would be injured when absorbing this energy.
For this reason, Aizen deliberately captured a lot of souls in Drifting Soul Street for experiments. As a result, all the experimental subjects died.
However, just when Aizen was worried about his Banyu research and development, a person appeared to help him.
This person was Urahara Kisuke, who had just become the captain of the twelfth division. Urahara Kisuke was really a genius.
While Aizen was developing Banyu, he was also developing Banyu, and the Banyu he developed was more powerful than Aizen's.
However, there was still the same problem. The energy in the Banyu seemed to be uncontrollable, and any Grim Reaper who tried to absorb its power was injured.
For this reason, Urahara Kisuke's research and development was declared a failure, and this Banyu was therefore sealed.
It wasn't that Soul Society didn't want to destroy the Banyu developed by Urahara Kisuke, but the result was that this thing couldn't be destroyed at all.
Although its body was only half the size of a fist, because the energy contained inside was too huge, it became extremely difficult to destroy.
If one wanted to move forward and use violence to destroy it, I'm afraid that the energy escaping would cause great damage to Soul Society.
So this Banyu was permanently sealed, and Urahara Kisuke's research and development was abandoned.
However, Aizen was very interested in the Banyu developed by Urahara Kisuke, because he was also one of the people who tried to absorb the power of Banyu.
The most important thing is that Aizen found that Urahara Kisuke's Banyu can just perfect the Banyu he developed.
If Aizen could combine these two Hogyoku, he would gain the power he never had before.
This power can even be powerful enough to destroy the world. Therefore, this Banyu became the target of Aizen.
But at that time, Aizen wasn't too strong. If he wanted to rule the world, his own strength was the most important.
So from then on, Aizen increased his training. Because he was extremely intelligent, no matter what, he could quickly grasp the essence of it.
However, all of this was done in secret. To the outside world, he had always maintained the image of a harmless gentleman.