"To be on the safe side... I'd better confirm Hitsugaya Toshiro's specific situation." Aizen thought for a moment.
Then, after the power from Phoenix's self-destruction had completely subsided, Aizen once again opened the dimensional space formed by the Super Caja Negación and cautiously walked inside.
Aizen acted very cautiously. Although logically speaking, even if Toshiro hadn't died from Phoenix's self-destruction, he would at least be frozen by the erupted ice-cold power.
But Aizen was still very careful, even ready at any moment. If Toshiro wasn't frozen but tried to come out through the tunnel he opened, he would immediately close the tunnel, absolutely not giving Toshiro a chance to get out.
"This is..." When Aizen re-entered the dimensional space formed by the Super Caja Negación, he was shaken by the sight before him.
A colossal iceberg, over a kilometer high and several kilometers long, stood towering at the center of the entire dimensional space. And the tiny, yet incredibly striking figure at the very center of the iceberg was none other than Toshiro, the man Aizen so deeply feared.
"What is this eerie stillness?" Looking at Toshiro inside the iceberg, Aizen suddenly frowned.
Because the Toshiro inside the iceberg, or rather the colossal iceberg nearly a kilometer high and several kilometers long, gave off a very strange and terrifying sense of stillness, as if everything within the iceberg's range, whether it's space, time or even everything, was frozen still.
'Could this be... Absolute Zero!?' Aizen seemed to suddenly realize something, his face full of shock.
Then, after observing more carefully for a while, Aizen said with a surprised expression: "I see. Flame Child absorbed a large amount of Hitsugaya Toshiro's ice-cold power. When this power was released in an instant, the energy formed was too terrifying, even reaching Absolute Zero. It then froze all matter within several kilometers, even light, darkness, time, space… these ethereal, even conceptual existences."
Absolute Zero is the theoretical lowest temperature. At this temperature, molecules and atoms stop moving. All matter is frozen. Even time and space become still. That's why Aizen, standing outside the range of Absolute Zero, felt that strange and terrifying sense of stillness.
"It seems Hitsugaya Toshiro is indeed not dead. However, being frozen within this colossal iceberg formed by Absolute Zero... it will be very difficult for him to get out anytime soon, or even for a lifetime." Aizen looked at Toshiro frozen in the iceberg and murmured.
Under normal circumstances, if frozen by Absolute Zero, one would definitely be dead, no question. Or perhaps, it couldn't even be called death, because under Absolute Zero, everything is frozen and still, and even the concept of death ceases to exist.
However, as the owner of the Strongest Ice-type Zanpakuto, Toshiro has great immunity to ice-based attacks, which is why he can barely survive in this situation. Anyone else, even someone else with an ice-type Zanpakuto like Rukia, would not survive in this situation.
After Rukia's Zanpakuto Bankai, she also possesses abilities related to Absolute Zero, being able to lower her own body temperature to Absolute Zero. However, in that state, she can only move for four seconds. But Toshiro can now survive indefinitely.
However, although he can survive, Toshiro cannot move freely like Rukia. Of course, this is not to say that Toshiro is inferior to Rukia. It's because Rukia's ability only lowers her own body temperature to Absolute Zero, while Toshiro is now frozen inside a colossal iceberg formed by Absolute Zero.
You must understand, at ultra-low temperatures, the hardness of ice is even greater than steel, and some is even close to the hardness of diamond.
Imagine if a person were wrapped inside several kilometers thick of steel or diamond. In that case, not to mention getting out, even moving would be impossible.
Under normal circumstances, the thickness of steel and diamond is measured in millimeters. Several kilometers thick of steel plate and diamond cannot even be blasted through by a nuclear weapon explosion.
So now, although Toshiro is surviving inside the iceberg formed by Absolute Zero, he has fallen into the awkward situation of being unable to get out.
"Well, although it didn't achieve the goal of severely wounding or killing him, in this current situation, Hitsugaya Toshiro can no longer obstruct me either. It's time to leave here and launch the decisive battle against Soul Society." Aizen murmured to himself.
"However... to be on the safe side, I'd better repair this place first." Aizen surveyed the scene within the entire dimensional space.
The entire dimensional space was formed by the Super Caja Negación. It could change size according to Aizen's will, but its maximum size was only a few dozen kilometers in diameter.
Although the range of Absolute Zero was only a few kilometers centered on Toshiro, and most of the power from Phoenix's self-destruction was directly endured by Toshiro, even the power that leaked out had almost turned the entire dimensional space into an ice and snow kingdom. Even cracks had appeared in the void, as if cracked by the erupted ice-cold power.
In this state, it seemed as if a single light blow could break the entire dimensional space.
So, to be on the safe side, Aizen decided to repair the entire dimensional space back to its original state. This way, even if Toshiro managed to get out of the Absolute Zero iceberg, it would still trap him for a few hours.
And Aizen would have enough time to defeat Soul Society, transcend the limits of a Shinigami, and complete his evolution.
Once he completed his evolution and reached the 'realm of God', Aizen felt that he would no longer have to fear Toshiro's existence. At that time, he would be invincible.
Thinking this, Aizen took out the Hogyoku from his chest and began to use its power to repair the entire dimensional space.
The Super Caja Negación was created by Aizen using the Hogyoku. Although it was an accidental product of a chance occurrence and not replicable, as long as it wasn't completely destroyed, it could still be repaired using the Hogyoku.
A mysterious light emanated from the Hogyoku. Under its illumination, the space that had been 'cracked' by the cold was once again erased of its 'scars', restored to its original state.
"Well then... it's time to leave here and proceed to the next step of the plan..." After repairing the dimensional space, Aizen thought for a moment.
Having said that, Aizen waved his hand and once again opened the spatial tunnel back to Hueco Mundo.
Then Aizen glanced at Toshiro, frozen inside the iceberg of Absolute Zero, and stepped into the black tunnel without looking back.
"When I ascend to that 'Heavenly Throne', if there is no one to witness it as my opponent, it would be far too lonely. So... if you can, by all means, come and stop me, Hitsugaya-kun..."
Although Aizen's figure had already disappeared, his slightly lonely voice echoed throughout the entire dimensional space...