Bleach: The Invincible Slacker from Rukongai

Thinking of this, Aizen couldn't help but roar in disbelief: "How could this happen? How is this possible?"

He couldn't accept such a failure, couldn't accept such an ending. It was so frustrating and painful to encounter the most unreasonable opponent when he was at his most successful. After all his careful planning, all his centuries of preparation, to be thwarted like this...

It hurt! It hurt so much!

The pain wasn't just physical—it was the agony of pride being crushed. Thinking back to when he was facing Ichigo Kurosaki, he felt so ashamed. He had just been beating himself up over it, wondering how a mere substitute Shinigami could push him to such limits.

At this moment, Aizen was shocked and angry, roaring continuously like a wounded beast. He didn't understand where he had lost. His mind raced through every calculation, every contingency he had prepared for. What had gone wrong? However, Aizen no longer had time to think about his failures.

Because over there, Kurosaki Ichigo stretched out his right hand with deliberate slowness. The black flame-like spiritual pressure wrapped around his arm immediately condensed into a blade, crackling with ominous energy. The very air seemed to tremble in the presence of this overwhelming power.

He raised the black energy blade and swung it gently toward Aizen, his movements almost casual despite the devastating force behind them.

"Mugetsu!"

A light swing of the sword carried unimaginable power that could wipe out everything and destroy all laws. The technique was beyond comprehension, transcending the very concept of what a Zanpakuto could achieve. The sword flashed, and the black spiritual pressure tore through the sky and earth like a hungry void. The burning black flames slashed at Aizen like lightning, leaving a trail of absolute destruction in their wake.

In an instant, Hollow Aizen's body split in half with a sickening sound. The powerful slash instantly melted most of Aizen's body, the intense heat vaporizing flesh and bone alike. Rock fragments and smoke covered his mutilated form, creating a scene of utter devastation.

After one slash of the sword, the black spiritual pressure wrapped around Ichigo Kurosaki faded away like a curtain being drawn. Part of the bandages on his body shattered into pieces, fluttering to the ground like fallen petals. The overwhelming power that had surrounded him was already beginning to dissipate.

Then a rustling sound was heard through the settling dust, and Ichigo Kurosaki turned around to see that Aizen, who had somehow recovered in the smoke, had fallen to the ground. Despite the devastating attack, the man was still breathing.

At this time, the six huge butterfly wings on Aizen's back and the three holes on his chest had all disappeared completely. Even the hundred-colored texture covering his body had become much lighter, appearing almost translucent. Grayish-white muscles were visible on his chest, giving him an almost corpse-like appearance.

Apparently, the power of the Hogyoku was used to restore his body, but it was no longer able to maintain the state of deep fusion. In order to recover from his injuries, Aizen's spiritual pressure, physical strength, and vitality were almost exhausted. He was gasping for breath.

Looking at the almost fully recovered Aizen, Kurosaki Ichigo was surprised and somewhat dismayed: "Is it high-speed regeneration again?"

In fact, this was a more perfect and advanced complete regeneration than high-speed regeneration. This ability could only be used by the Hogyoku, and it possessed more powerful regeneration abilities than any hollow or arrancar technique.

If vital organs were damaged, high-speed regeneration couldn't restore them completely. But complete regeneration could even recover from injuries like half of the body being melted away. This kind of recovery ability was considered true immortality—a power that defied the natural order itself.

Just as Ichigo Kurosaki was about to make another move, preparing to finish what he'd started, the bandages on his body completely shattered. The remaining wrappings fell away like discarded cocoon silk. He was completely transformed back to his original state, the overwhelming power leaving him as quickly as it had come.

His hair also changed back to short orange hair, and the chains on his arms disappeared entirely. Feeling his body getting weaker and weaker with each passing second, Kurosaki Ichigo fell to his knees helplessly. The strength was draining out of him like water through a broken dam.

"Oh no, the Shinigami powers are about to disappear completely!"

Without Mugetsu, he wouldn't be able to compete with Aizen anymore. The technique had been his final trump card, and now it was gone. He had failed after all, despite giving everything he had.

"Look, my Kyoka Suigetsu is disappearing." Aizen raised his right hand with an almost ceremonial air. The Zanpakuto in his hand was breaking into pieces and dissipating into dust, each fragment catching the light before vanishing forever.

Aizen continued with a mixture of triumph and melancholy: "You should know what this means. The Hogyoku judged that from now on, I would no longer need to use the ability of Kyoka Suigetsu. In other words, the power of the Zanpakuto has completely merged with me. I have transcended the need for such tools."

"Just like Uehara Shiroha and you just now. However, you have completely lost your energy now, while my strength has long surpassed yours. It's time to end it, Kurosaki Ichigo! The final winner can only be me!"

Despite his confident words, there was something almost desperate in Aizen's tone—as if he was trying to convince himself as much as his opponent.

At this moment, a special spiritual pressure that had been dormant for a long time suddenly burst out from within Aizen's body. This spiritual pressure transformed into a kido seal like a flaming arrow, which bound Aizen's body and spiritual pressure with glowing red chains.

Looking at the red spiritual pressure flame that suddenly pierced out from his body like a living thing, Aizen asked in confusion and growing alarm: "What the hell is going on? Is it kido? When was it set up? Who cast it? Uehara Shiroha? He obviously didn't make contact with me directly."

As he spoke, he looked around frantically, his eyes darting to every shadow and corner. He was now seriously exhausted from the regeneration process. If Uehara Shiroha appeared now, he would definitely be defeated. The thought sent a chill down his spine.

"The kido seal has finally taken effect." A familiar lazy voice sounded from above them, carrying just a hint of satisfaction.

Hearing the voice, both Ichigo Kurosaki and Aizen looked up and saw Urahara Kisuke appear without his signature hat. His blonde hair caught the light as he descended gracefully. Looking at Urahara Kisuke with light golden hair flowing freely, Kurosaki Ichigo said in surprise: "Mr. Urahara..."

He had thought that the one coming to support him would be Mr. Uehara. After all, Aizen was far too powerful now in his current state. Just earlier, Manager Urahara and the other two masters hadn't been able to win against him. Could Urahara really win in a 1v1 now? Or was Aizen's current weakened transformation somehow related to whatever Urahara-san had planned?

"Urahara Kisuke, so it was you who did this." Aizen's voice carried both anger and a grudging respect. He was relieved that the person who came wasn't Uehara Shiroha—that would have been truly problematic. But his current condition didn't seem to be improving, and facing Urahara Kisuke in this state was still dangerous.