At the same time, Aizen's situation was not very good either.
The Hogyoku he himself created was, after all, just a flawed product, not perfect. Moreover, he had made no preparations beforehand.
Now, under pressure from Toshiro, rashly embedding the flawed Hogyoku into the wound on his chest for forced fusion placed an immense burden on his already injured body.
Aizen's face flushed red, and the veins on his exposed skin bulged. His originally gentle and refined image now looked somewhat ferocious.
Furthermore, the suddenly increased Reiryoku rampaged within his body, extremely difficult to control, as if it might go berserk and explode him at any moment.
However, Aizen gritted his teeth and persevered, barely suppressing those unruly spiritual energies within his body.
Then, feeling the vast power within him, Aizen couldn't help but want to indulge in it.
But Aizen was, after all, a man of strong will. He snapped out of it in an instant, and then showed a hint of dissatisfaction.
'How regrettable. Although this power is very powerful, it ultimately hasn't surpassed the limit of a Shinigami's peak.'
'It seems that relying on this flawed Hogyoku in my hand to break the limit of a Shinigami and evolve to a higher level is impossible. Now, it seems the only way is to try and seize the Hogyoku created by Urahara Kisuke from Hitsugaya Toshiro, and then fuse them into a complete Hogyoku to achieve that.'
Thinking of this, Aizen looked at Toshiro again, then walked step by step towards where Toshiro was.
"Come on, Toshiro-kun, show me your true strength!"
Aizen's confidence soared, and he challenged Toshiro with full confidence.
At this moment, after forcibly fusing with the Hogyoku, Aizen was filled with confidence. Although he had only fused with his own flawed Hogyoku, in Aizen's view, it was enough to defeat Toshiro.
"What's wrong? Why won't you use your Bankai to fight me? You don't think you can defeat me without releasing your Zanpakuto, do you?"
Seeing Toshiro standing there unmoved, Aizen frowned.
"Ah, I see..."
Without waiting for Toshiro to answer, Aizen showed a look of sudden understanding.
"You're worried that if you use Bankai and fight me with all your strength, it will affect the Seireitei, right?"
Aizen easily guessed what Toshiro was worried about.
"Hehe... Don't worry about it, Toshiro-kun. I don't care at all about our battle damaging the Seireitei or even the Soul Society's environment!"
"Heh... hahaha..."
Seeing Toshiro's worried expression, Aizen couldn't help but laugh heartily. He didn't care at all if the battle damaged the Seireitei or even the Soul Society. After all, he was going to leave the Soul Society anyway, so even if the Soul Society was destroyed, he wouldn't mind.
Moreover, if Toshiro was hesitant because of concerns about damaging the Seireitei and fought with his hands tied, that would undoubtedly be even more advantageous for Aizen.
"Since Toshiro-kun has concerns, let me make the first move..."
Saying this, Aizen prepared to actively attack Toshiro. After all, he was only in a state of forced fusion with his Hogyoku. This state couldn't be maintained for long.
And once he exited the fusion state, his already injured body would undoubtedly be even worse.
"Hmph! Do you think I haven't prepared anything, Aizen!"
Looking at the smug Aizen, Toshiro suddenly snorted coldly.
"Activate Plan Two!"
Toshiro looked at the sky and suddenly shouted.
"What! Plan Two?"
Boom! Boom! Boom! Boom!
Before Aizen could finish his words, four huge stone pillars suddenly fell from the sky, scattered in the east, south, west, and north. The pillars were covered with densely carved mysterious runes.
Then, a light flashed on the pillars, and a spherical transparent barrier enveloped an area of several hundred meters around Toshiro and Aizen, completely enclosing them, while completely blocking everyone else outside.
"What is this?!"
Seeing this unexpected development, Aizen felt a sense of unease in his heart.
"This is the second plan I carefully prepared for you, Aizen."
Toshiro slowly began to speak: "After discovering your scheme, I thought about how to deal with you. After discussing with the Captain-Commander, the first plan we decided on was… 'Surprise Attack'."
"Although this method is a bit underhanded, if it could eliminate a troublesome guy like you, I wouldn't mind doing it. That's why I faked my death earlier, made you let your guard down, and then secretly looked for an opportunity to launch a sudden attack on you."
"But unfortunately, it failed."
"However, considering you are such a troublesome opponent, we did consider the possibility of the first plan failing. So, just in case, we specifically prepared a second plan."
"And the second plan was to create a special battlefield where I could go all out without worries and defeat you."
"It seems like it's come in handy now..."
Toshiro said somewhat thankfully.
"Heh heh heh... Aizen, let me explain what these four pillars are!"
After Toshiro finished speaking, a somewhat strange voice suddenly came from all directions, making it impossible to tell where it was coming from.
"Oh? Isn't that Kurotsuchi Mayuri's voice? I remember you were never interested in anything outside of research. I didn't expect you to come this time too?"
Aizen instantly recognized it as Mayuri's voice, but that was precisely why Aizen was somewhat surprised.
"Hmph, don't bother trying to find me. It's a waste of effort. I'm not on the Sokyoku Hill. As for now, I'm just transmitting my voice to the scene through some equipment..."
At the 12th Division, Technology Development Bureau.
Mayuri looked at a screen showing Aizen trying to find him and let out a smug laugh.
"Aizen, let me explain it to you properly. These four pillars are the [Space Stabilizing Pillars] I specifically crafted for you. They can form a special barrier."
"The strength of this barrier is extremely powerful. Even someone of Captain-Commander Yamamoto's level would find it very difficult to break it with all their strength. Moreover, it can temporarily isolate the connection with the external space and greatly enhance the spatial strength within the barrier."
"Well, in short, no matter how much you fight inside, it won't affect the outside situation."
Aizen understood: "I see. No matter how you fight, it won't affect the outside. You did this to protect the Seireitei and the Soul Society, right? You really went to a lot of trouble."
"And also, maintaining the Space Stabilizing Pillars requires a huge amount of high-density Reiryoku. So, Captain-Commander and the other Captains, please input your Reiryoku to maintain the barrier."
Mayuri's voice came again.
Hearing Mayuri's words, the Captains outside the barrier looked at each other and nodded.
Yamamoto, Retsu, Kyoraku, and Ukitake flashed and each appeared in front of a pillar. They placed their hands on them and began to input their Reiryoku.
Meanwhile, Sui-Feng, Zaraki, and Yoruichi stood in front of Gin and Tosen to prevent them from taking the opportunity to destroy the Space Stabilizing Pillars from the outside.
Although Rangiku had her sword at Gin's neck, seemingly having captured him, the others obviously didn't think that would be enough to make Gin obedient.
As for the remaining Captains, they were all seriously injured and couldn't easily act, so they could only obediently watch.
And the Lieutenants were even more out of the question. At this point, they couldn't even participate anymore.
…
"Then, Aizen, come on! From now on, let's fight with all our might!"
With his worries solved, Toshiro's fighting spirit soared.
"Ah, by the way, Captain Hitsugaya..."
Mayuri's voice suddenly sounded inopportunely.
"Based on my analysis of the Reiatsu intensity Aizen just released, considering the material of the Space Stabilizing Pillars, they can only last for three minutes at most."