The reforms are not progressing quickly; they haven't been implemented all at once, and many things related to the Soul King are still unclear.
Urahara took the crystal to the Twelfth Division, and Kirio Hikifune went down to study it as well. Mayuri Kurotsuchi was about to throw a tantrum, but after being glared at by Jun, he ran off to study it. He knew very well that if he lost his temper with Jun, the only possibility for him was being kicked out of the research group.
The effects of the crystal were quickly understood; it was something used to sustain mental life. Didn't Mayuri Kurotsuchi research a Superhuman Drug that could increase thought speed by a thousand times? This substance could reduce thought speed by thousands of times.
Therefore, the Soul King's life was extended thousands of times. His physical life had long since ended, but his spirit lived on, continuing to evolve with time. And it is precisely because of this that the Soul King was not incapable of handling matters, but rather, he was thousands of times slower.
For example, Yhwach's plan was devised thousands of years ago, and then a thousand years ago, it was discovered that something was wrong with Yhwach. Yes, the Soul King discovered this problem, and then he made backup plans, namely the Hōgyoku. However, this operation took him more than five hundred years to complete.
However, this also demonstrates that the Soul King was truly holy, a true saint, and everything he did was for the Soul Society. Why would someone put themselves in such a state, even at the very end, as their life was about to end, still thinking about their successor?
Perhaps this is love. The Soul King created the Soul Society; the Soul Society is his child. No matter how wicked this child is, it is still his child.
After studying the effects of the crystals, Urahara immediately took out the Hōgyoku. Tōsen, without further ado, used the Hōgyoku's help to transform from Soul Reaper into Quincy in less than half a month, becoming a true Quincy —a pureblood at that.
However, he didn't possess the power of the Soul King, so the group went to find the Mimihagi in Rukongai. This was the very thing that Ukitake had used to prolong his life, which was also the Soul King's Right Hand.
However, Tōsen doesn't yet know the Sklaverei, and it will take him some time to become familiar with the Quincy's power. During this time, countless people are busy trying to save Ukitake's life.
Because the Soul King's Right Hand was sustaining Jūshirō Ukitake's life, if Tōsen were to reclaim that right hand with the Sklaverei, Ukitake would surely die. However, good news suddenly appeared.
The first Sklaverei artifact Tosen used after mastering the Sklaverei Tōsen the Hōgyoku. The Hōgyoku's power wasn't yet exhausted, and after Sklaverei Hōgyoku, Tōsen knelt and wept bitterly. It turned out that the Hōgyoku contained some words from the Soul King regarding his successor.
"My successor, the Soul-Extending Crystal is about to expire, and my life is nearing its end. I hope you can use this power to stop my descendants from harming this world."
"I also hope you can forgive my descendants and choose one of them to join you in carrying on my responsibility and maintaining peace in this world."
"My body has vanished; everything about me is sealed within my right hand. Find it, merge with it, and you will gain all my knowledge."
Remember! Protect this world!
Ukitake sighed, "In the end, they'll still need me, so..."
"No!" Chun suddenly spoke up, "You've forgotten something: the Soul King is still alive, at least for now."
Everyone stared at Chun in disbelief. Chun nodded. "What I said is exactly what you're thinking: kill him, absorb him."
"You're insane!" Tōsen lunged forward and grabbed Jun.
Chun looked up towards the direction of the Soul King Palace, his gaze profound. "I think this is a kind of liberation. Do you still want that great being to continue like this? Kill him."
Everyone was stunned. They all looked up in the direction of the Soul King Palace, remaining silent for a long time.
After a long period of intense discussion, the decision to kill the Soul King was approved. However, during this time, everyone went to the Dangai to search for the Soul King's internal organs, and with the help of many Arrancar, they found them, encased in something called the Soul King -Soul-Extending Crystal.
And that's not all. The Arrancar also found the connection between the Dangai and Soul Society, surprisingly, underground within Soul Society. They also found the connection between the Dangai and another world—the Bottomless Abyss. Strangely, although it's a connection point, it's actually a wall.
So no one touched these connectors, and these worlds were left connected as they were.
Then, within the Soul Society and the Dangai, a group of people chipped away at the Soul-Extending Crystal until only a thin layer remained, just enough to touch the Soul King. This was done on both sides. Then, they handed it over to Kaname Tōsen and Haschwalth to simultaneously shatter, and together they used the Sklaverei on the Soul King's body and internal organs to fuse with the Soul King.
The result was, of course, a success. And at the very moment the two merged with the Soul King, the Soul King's handover ceremony was also completed. The two automatically became resonant entities of two worlds. As long as Haschwalth remains in the Dangai, it will never be a pure world; the Kōtotsu will forever destroy it.
Speaking of the Kōtotsu, the Kōtotsu that appeared in the two territories that Uryū wiped out that day were raised. After a period of time, everyone discovered that the Kōtotsu would die after growing to about the size of a human.
The dead Kōtotsu will spawn more Kōtotsu from the corpse, then grow to human size again before dying, and the cycle repeats.
It was also discovered that the Kōtotsu do not live by consuming Spiritual Power; they possess Soul Return energy within them, meaning they can generate Spiritual Power themselves. Furthermore, their death turns them into soil, implying that the Kōtotsu are the fundamental creators of the world.
Of course, Spiritual Power could accelerate the growth of the Kōtotsu, so the Twelfth Division began raising Kōtotsu and accelerating their growth, keeping only one Kōtotsu per generation. After 99 generations, the Kōtotsu finally died.
Therefore, the research on the Dangai was also completed. While the Kōtotsu would all perish, the Soul King used his power to create a strange wind that could create Kōtotsu. Yes, this is the fundamental reason for the eternal existence of the Dangai: the Kōryū that Spiritual Power Erasure.
After the dual-core Soul King is formed, the Soul King in Soul Society no longer needs to remain there Soul Society. The Soul King of Soul Society is not important; what matters is the one in the Dangai. As long as the one in the Dangai exists, the Dangai can exist indefinitely.
Therefore, Chun's conjecture about the dual-core Soul King is both correct and incorrect. It's correct because it is indeed the idea of the older generation of Soul Kings; it's incorrect because once everything is made clear in Chun's system, there's no need for a dual-core Soul King.
"That's not the case," said Tōsen, but it wasn't Tōsen. This was the old Soul King, whose remaining consciousness had been preserved after being absorbed. However, this great sage only had less than a year left to live.
"Oh? I'm all ears for your insightful opinion," Chun said with a grin.
The Soul King didn't seem to care about Chun's attitude at all. He chuckled and said, "Dual cores are still necessary. Letting someone, especially someone like the Soul King, remain in the Dangai forever—who knows what he might do after such a long period of solitude?"
Chun suddenly realized, "That's right, was it because I hadn't thought of it carefully? Or is it because you're so insightful, sir?"
"Haha, you're just flattering me, oh~ that's it up ahead."
Chun and the Old Soul King arrived within the area influenced by Hell. The Old Soul King was quite moved, saying, "I was only thinking about preventing our leaders from becoming Transcendent Level monsters, but I overlooked population growth. The world is developing so fast, hahaha!"
Yes, the world is developing exceptionally well.
"Then I can rest easy. Leave your body to Tōsen. I'm a thing of the past. Don't cling to me anymore; I should have disappeared long ago. Thank you, thank you for letting me see all of this."
"I dare not accept your thanks. Everything I've done is based on what you've accomplished. You are a giant, and I am merely standing on your shoulders to see the future."
Haha, I'll accept your compliment.
Tōsen regained consciousness and shed tears, as did Jun, for the great sage had dissipated his last vestiges of consciousness, and from that moment on, the world would never again have its oldest Soul King.
"Let's go, modifying the Hell system still requires our efforts."
"Um!"
The modification of Hell took decades. Tōsen and Haschwalth took turns guarding the Dangai, and finally changed the rules of Hell, referencing the Underworld System proposed by Jun.
From this day forward, all human Dead Souls and arrive in the afterlife will have to pass through Hell before being judged under the watchful eye of the Five-Day Ten-Blade Shields.
If someone commits grave sins in the human realm and shows no remorse, they are cast into Hell; if innocent, they are sent to the Silent Sand Sea; if virtuous, they are sent to the Soul Society; and if sinful yet repentant, they are similarly sent to the Silent Sand Sea.
The Silent Sand Sea has become a new gathering place for Dead Souls. The Dead Souls will use their Spiritual Power to improve the appearance of the Silent Sand Sea. If they can turn the Silent Sand Sea into an oasis, they can enter the Soul Society.
The Soul Society became a true Heaven, a place where everything one could desire existed, an incredibly wealthy life, carefree and endless, where one could roam forever until they grew tired of living in the afterlife.
A hundred years later, Chun was fiddling with a newly created reincarnation machine, and the options on it were all about great wealth, carefree life, and windfalls—the kind of divine choices.
"That's going too far!"
"Haha, why can't I do this since I've been given a second chance at life?"
Have you made up your mind?
"Ah, it's decided. Isuzu and I want a real child. The only downside to Utsugi is that she can't have offspring."
Jun and Isuzu chose their respective red threads on the reincarnation machine, binding themselves tightly together, certain to meet again in the next life. Looking back at their friends in the afterlife, the couple waved goodbye and smiled as they entered the reincarnation machine.
However, immediately after the two went inside, two girls ran out. Nel and Tier Harribel readjusted the reincarnation machine, both of them tying their red threads to Jun's and then also entering the reincarnation machine.
Finally, Golvi came out, bringing a whole bunch of things—mischievous, cute, and so on—and then setting herself up as Jun and Isuzu's second daughter.
"Now you have a real child of your own, but you'll still be my parents. Here I come!"
Aizen watched all this with a smile, then turned and left, thinking, "This is quite a mess."
Felix, still talking to Aizen, "Yeah~"
After meeting the Soul King, the Captain-Commander his position and disappeared from Soul Society, followed by Chōjirō Sasakibe and Retsu Unohana.
Rukia chose to live in the World of the Living using Gigai artificial body). The Gigai was developed to its third generation, capable of mimicking everything about a living person. The two had two sons and a daughter in the World of the Living world. Ichigo, the two returned to Soul Society.
After graduating from high school, Uryū went to Tokyo University to study medicine. In the original work, he disliked studying medicine because he saw Ryūken manipulating Yoru's corpse and extracting Silver Blood. This doesn't happen in this timeline, so he still studies medicine.
Sado, just like in the original work, became a boxer, winning his first world championship belt at the age of 24. After winning three consecutive titles, he retired abruptly and ran Paranormal Detective Agency.
The Fullbring Organization faced a generational gap several decades into the World of the Living realm, but due to their connections with the afterlife and knowledge of the current situation, the massive organization gradually disappeared over the next century.
Ulquiorra and Rukia made similar choices, but he and Orihime were quickly reincarnated using the Reincarnation Machine after Orihime's death, and the two were incredibly artistic, choosing nothing except to tie themselves together with a red string.
A century later, Isshin and Isshin also chose to remain in Soul Society. Karin, Yuzu, and Maya, the three siblings, eventually became key members of the Fullbring Organization. Karin, possessing an adventurous and inquisitive spirit, became madly infatuated with what happened back then. At 20, she relentlessly pursued Uryū, who was still single at 28, and the two married two years later.
The story of the Soul Reaper world has come to an end.