Emergency war reports from the border were sent back to Konoha one after another like snowflakes.
Since the first attack on the patrol, in just half a month, similar strange attacks have occurred on the four border lines of Land of Fire's east, west, north and south. The attackers, without exception, are long-dead ninjas, and some are Konoha's fallen seniors, some of whom were strong men from other ninja villages who died in previous Shinobi World wars, all possess the ability to regenerate without death, and have complete Ninjutsu and Kekkei Genkai during their lifetimes.
Konoha's border patrol team reluctantly retreated from the attack after paying a heavy price of casualties, desperately bringing back more Impure World Reincarnation body fragments, battle records, and detailed information about the attackers.
Every time he received samples and reports from the front line, Tsunade would immediately send them intact to Rinto's hospital gate. Rinto would accept the samples every time, but never said much, just study them behind closed doors. Occasionally, the ninja guarding the door would tell Tsunade, "Continue to collect more samples of different types."
Konoha High Command's anxiety is getting worse day by day.
From the intelligence sent back one after another, they discovered that these Impure World Reincarnation ninjas were no longer attacking sporadic individuals. More and more dead people appeared, ranging from ordinary Jonin to the former Kekkei Genkai family patriarch., and even the legendary ninja who was famous in the Shinobi World war. It is obvious that the caster behind it controls a huge Impure World Reincarnation army. This is by no means a simple border harassment, there must be a huge conspiracy hidden behind it.
What makes them even more desperate is that in the face of these immortal Impure World Reincarnation ninjas, Konoha ninjas have almost no effective response. Conventional attacks cannot kill them at all. Even if their bodies are blown into powder, they can be completely regenerated in a short time. They can only delay and seal them. The difficulty of sealing is extremely high, and it is simply unrealistic to face large-scale Impure World Reincarnation ninjas.
The entire Konoha, from top to bottom, has pinned its hopes on Rinto. Everyone is waiting for Rinto to develop a solution to Impure World Reincarnation.
Rinto in the laboratory didn't care at all about Konoha's anxiety and Shinobi World's undercurrent. All his attention was immersed in the in-depth dismantling of Impure World Reincarnation's technique.
In the past half month, he received more than a dozen different Impure World Reincarnation samples, including Sunagakure Magnet Release ninjas, Iwagakure Earth Release strong men, and Konoha secret family ninjas. Each sample provided him with brand new research data.
His research has gone from the very beginning of basic sample testing to the core underlying logic of the Impure World Reincarnation technique.
The experimental table is filled with different types of Impure World Reincarnation fragment samples. Each sample is placed in an independent isolation detection cabin. Various data, curves, and models are densely refreshed on the light screen. Rinto is sitting in the middle, and the charcoal pen in his hand is writing on the huge slate. Lines of formulas, dismantled formula structures, and rules and logic are all covered with the entire slate.
He has thoroughly understood the complete process and core mechanism of Impure World Reincarnation.
The essence of this forbidden technique is divided into four core links: first, using the flesh and blood of the deceased as a medium to obtain the inherent frequency of the deceased's soul, accurately locating and locking the soul of the deceased in Pure Land; second, using a living person as a sacrifice, using the technique to transform the body of the sacrifice, transforming it into a container that can accommodate the soul of the deceased, replicating the physical characteristics of the deceased and Kekkei Genkai; Third, forcefully open the channel between Pure Land and the present world, recall the soul of the deceased, and forcibly bind it in the transformed body of the sacrifice; fourth, plant the caster's control spell on the soul, suppress the consciousness of the deceased, and at the same time establish an energy supply link to support the infinite regeneration of the body and the release of Ninjutsu.
What interests him the most are the two core technical points: one is the forced splitting of the soul and the whole-cell binding mechanism, and the other is the infinite regeneration of energy supply and body reconstruction logic.
The soul anchoring he studied before was the original binding of the soul as a whole to the body. The soul is a complete whole, anchored on the core nodes of the human body. But Impure World Reincarnation actually split the soul of the deceased into countless tiny fragments and evenly bound them. It is fixed in every cell of the sacrificial body. This is why, even if the body is blown up to only a few fragments, the entire body can be regenerated by relying on the soul mark in the fragments - because every cell contains complete soul mark and body reconstruction information.
This kind of refined manipulation of the soul was something he had never been exposed to before. Even he had never done this kind of experiment of splitting the soul and binding the whole cell before. The developer of this technique, although rough in applying the rules of the soul, had unexpected ingenuity.
The mechanism of infinite regeneration is completely beyond the conventional Yang Release regeneration logic. Conventional cell regeneration requires the consumption of life energy and Chakra, even Tsunade's Strength of a Hundred Technique also relies on the Chakra stored in advance to accelerate cell regeneration, which has an upper limit. But the body of Impure World Reincarnation has almost no upper limit for regeneration. Even if it is blown to pieces countless times, it can recover instantly.
Through repeated testing of multiple sets of samples, Rinto finally dismantled the mystery. Impure World Reincarnation's body is essentially no longer a normal flesh and blood body, but is composed of Chakra, the soul mark of the deceased, and the sacrifice. The body is a special energy body formed by the combination of the three. Its regeneration is not a conventional cell division, but uses the soul imprint as a template, and uses Chakra to directly reconstruct the body tissue. As long as the soul imprint is not destroyed and the user's energy supply is continuous, it can regenerate indefinitely.
What's more interesting is that he found that the caster made a lot of optimizations and improvements to Impure World Reincarnation. From Second Hokage's notes, the original Impure World Reincarnation developed by Tobirama had many flaws, such as the inability to perfectly reproduce the strength of the deceased and the impact on the soul. Control also has limitations. Now the Impure World Reincarnation spells in these samples have been optimized to the extreme. Not only can they perfectly reproduce the peak strength of the deceased, but they can also completely suppress the deceased's consciousness through spells, achieve absolute control, and even forcibly remove the Ninjutsu restrictions of the deceased's lifetime.
"Interesting, much more complete than what was recorded in Tobirama's notes." Rinto muttered in a low voice, his fingertips swiping across the analysis diagram of the spell structure on the light screen, his eyes full of inquiring light.
In each Impure World Reincarnation sample, he found the control spell planted by the caster. This spell is one of the cores of the entire spell. It is responsible for suppressing the consciousness of the deceased and maintaining the restraint of the soul. It is also responsible for transmitting to the caster. Chakra, a link to issue commands. The structural design of this spell is extremely sophisticated, and even incorporates the Cursed Seal technology of Orochimaru. It is much more complex and domineering than the original spell of Tobirama.
As the research deepened, he not only thoroughly understood the principle of Impure World Reincarnation, but also naturally found the core weakness of this forbidden technique, which was the key node for soul release.
The two core anchor points of the entire Impure World Reincarnation system are the mandatory binding mark between the soul and the body, and the other is the control spell planted by the caster. These two points are the life gate of the entire spell.
If you want to break Impure World Reincarnation and release the bound soul, there are two ways: one is to completely erase the control spell of the caster from the outside, cut off the binding link of the soul, and let the soul escape the forced binding and return to Pure Land; the other is to let the consciousness of the deceased break free from the suppression of the spell, forcibly unbind the soul to Impure World Reincarnation's body, and return to Pure Land independently.
For Rinto, both paths have clear and achievable technical solutions. He has even designed a soul release configuration specifically for Impure World Reincarnation based on his own research on soul rules, which can accurately erase the control mark of the caster, release the forced restraint of the soul, and allow the soul of the deceased to escape from the body of Impure World Reincarnation and return to Pure Land safely.
But he was not in a hurry to tell Tsunade how to crack it.
Because his research is not over yet. Most of the existing samples are just ordinary Jonin, or ninjas with a single Kekkei Genkai, which can provide limited research data. He can foresee that there will be more in the future, stronger, and richer types of Impure World Reincarnation samples appeared. Those legendary ninjas of the past, various rare Kekkei Genkais, and special secret systems were all extremely valuable research materials that he had never come into contact with before.
He needs more samples to improve his research on the Impure World Reincarnation technique, and at the same time, he can collect more underlying rule data of Kekkei Genkai and special Ninjutsu to further improve his Chakra general theoretical system.
At this moment, a ninja's voice came from outside the courtyard gate, with obvious urgency. "Mr. Rinto, Lady Tsunade asked us to send you new samples. They were just sent back from the front line, Iwagakure's Impure World Reincarnation body fragments of the previous generation Tsuchikage, and complete battle records!"
Rinto's eyes instantly lit up. The previous generation Tsuchikage was the legendary ninja who mastered Kekkei Tōta and "Dust Release". Samples of this level have much higher research value than the previous ordinary ninjas.
"Bring it in." Rinto said immediately.
The courtyard door was pushed open, and two ninjas ran in carefully holding the seal scroll, placed the scroll on the experimental table, and said respectfully, "Mr. Rinto, this is the Ōnoki of Both Scales of the Impure World Reincarnation that was encountered at the border. His Dust Release is extremely destructive. Strong, our team paid a great price and barely managed to bring back some fragments. In addition, Lady Tsunade, let us ask, have you made any progress in your research on Impure World Reincarnation? The pressure on the front line is increasing, and the brothers are facing these undead enemies, and the casualties are getting heavier and heavier."
"The samples are here, you can go." Rinto picked up the seal scroll without raising his head, and said in a calm tone, "I have figured out the core mechanism of the technique, and there are ways to crack it, but I need more samples of different types to complete the corresponding countermeasures. New samples will be sent over as soon as possible."
The two ninjas were stunned for a moment, and then there were expressions of ecstasy on their faces. Mr. Rinto said that he had figured out the core mechanism and had a way to crack it! This is absolutely great news for the anxious Konoha!
They quickly bowed and saluted. "Yes! We understand! There will be new samples in the future, and we will send them to you as soon as possible!"
The two of them exited excitedly, quickly ran back to the Hokage building, and reported Rinto's words to Tsunade.
In Hokage's office, Tsunade, Shikaku, Kakashi and others all breathed a long sigh of relief when they heard the news. After hanging on for more than half a month, they finally let go. As long as Mr. Rinto finds a way to crack it, Konoha will have the confidence to deal with this crisis.
"Great! I knew that Mr. Rinto would definitely be able to do it!" Tsunade hammered the table excitedly, "Immediately notify the frontline troops to collect different types of Impure World Reincarnation samples first, and send them back to Mr. Rinto even if it costs some money. At the same time, be prepared to promote it to the entire army as soon as the Mr. Rinto cracking plan comes out!"
In the laboratory, Rinto couldn't wait to open the seal scroll, took out the body fragments of the Dust Release user, and put them on the testing equipment.
Kekkei Tōta, this is a rarer and higher-dimensional Ninjutsu ability than Kekkei Genkai. It involves the fusion of two or more property changes to produce a brand new escape technique. This is of great value to him in studying the property changes of Chakra and the underlying rules of Kekkei Genkai.
His eyes were tightly locked on the data refreshed on the light screen, and his eyes were full of concentration. He had already understood the mechanism of Impure World Reincarnation's technique, and next, these ninjas summoned by Impure World Reincarnation would become his largest sample library to improve the entire Ninjutsu rule system.