Senju Tobirama recalled his experiences in the future, and he remembered more and more details.

He murmured: "Uchiha Obito controlled Nagato of the Akatsuki organization, the resurrected Uchiha Madara controlled Uchiha Obito, and finally Black Zetsu controlled Uchiha Madara..."

"And the resurrected Kaguya Otsutsuki was easily sealed. Too many coincidences happened during that time. She couldn't hide the feeling that she was being plotted against."

"The only one who can plot against the Goddess of the Rabbit is..."

Senju Tobirama's voice was loud and trembling at the same time: "It's possible. It's very possible."

"Otsutsuki Kaguya had just been resurrected, and the Six Paths Sage immediately took action."

"He silently helped Uzumaki Naruto and Uchiha Sasuke, allowing them to become Six Paths-level warriors, and guided them to seal the Goddess of the Rabbit to save the world."

"And these two children are the reincarnations of the Six Paths Sage's son."

"Haha, these are two reincarnations of the right age and identity. They were precisely prepared 16 years in advance. I wonder how much work and hard work went into this precision."

Uchiha You smiled and said, "Yeah, it's hard to imagine."

"Based on this result, we can infer that the Six Paths Sage's control over Black Zetsu and the situation in the ninja world is absolutely perfect!"

Senju Tobirama's sigh was suddenly interrupted, and fear flashed in his eyes as he looked at Uchiha You.

Uchiha Itachi raised his eyebrows and said with a smile: "Don't worry, the Six Paths Sage of our ninja world has already lost control of the ninja world."

"In the past two years, I have changed a lot of things and killed a lot of people. Most of the plans of the Six Paths Sage in the Ninja World were destroyed by me."

"I don't think he has the energy to pay attention to people and things that have nothing to do with me."

Senju Tobirama said in surprise: "I see, no wonder you are only staying in this Loulan secret realm now, but this is too miserable."

Uchiha You said: "I really have to hide in the Loulan Secret Realm to avoid the sight of the Six Paths Sage 100%. It is indeed uncomfortable to stay in the Loulan Secret Realm."

Senju Tobirama: "You left the Loulan Secret Realm when you picked me up just now. It seems that it's okay to go out for a short time."

Uchiha You smiled: "Nidaime, how did you know it was me who picked you up?"

Senju Tobirama was no longer confident: "Shadow Clone Jutsu, no, Wood Clone Jutsu?"

Uchiha Yuu: "Wood Clone Technique."

Senju Tobirama: "I didn't see that at all. You developed this technique so perfectly. It's incredible."

Uchiha You: "If not, how can we deceive the Sage of Six Paths?"

“That’s right.”

Senju Tobirama continued to talk about his experience in the Fourth Ninja World War.

When describing the four Impure World Hokage appearing on the battlefield at the same time, Senju Tobirama sighed: "That kid Orochimaru actually gave the future world's Second Hokage Impure World Reincarnation."

"I was terrified when I saw myself on the battlefield."

"You told me that the Nine-Tails Jinchuriki from the future world came to our world, causing our Nine-Tails Jinchuriki to change."

"There have been problems before the two Nine-Tails Jinchuriki even met. If the two Senju Tobirama meet through the Impure World Reincarnation method, God knows what problems will arise."

"As a result, nothing happened, but it aroused my interest."

"After a careful comparison, I found that they are both reincarnations of Senju Tobirama. My soul fluctuations are exactly the same as his, but there is a huge difference in chakra, and the difference is determined by the sacrifice."

"They may seem like two reincarnated Senju Tobirama, but they are actually two different sacrifices. There is no possibility of interference between them."

He went on to narrate the process of the battle between the four Hokage and Uchiha Obito, as well as Uchiha Madara's resurrection, regaining the Rinnegan, and crushing the entire audience with his domineering attitude.

Senju Tobirama said disdainfully: "This is the first time I've seen Uchiha Madara like that, with his brother's head in his chest, talking about Hashirama all the time."

“How disgusting!”

Uchiha You smiled and said, "Is Uchiha Madara powerful?"

Senju Tobirama was silent for a long time before he sighed, "Amazing. Uchiha Madara only gave me a feeling of despair. He was much scarier than Kaguya Otsutsuki who later used his body as a sacrifice to break free from the seal."

"That woman is more powerful, but she gives me no sense of pressure. She is just a clumsy idiot who doesn't know how to fight."

Uchiha You's eyes sparkled with yearning: "If I have the chance, I really want to fight with Madara who has become the Ten-Tails Jinchuriki. It must be very interesting."

But that’s where Tobirama Senju’s story ends. When Uchiha Madara performed the Infinite Tsukuyomi, he, like everyone else, was hypnotized and suspended.

By the time Senju Tobirama broke free from the constraints of the sacred tree, the Six Paths Sage had already summoned the five successive Kage and Team 7, the nine tailed beasts, and the dying Uchiha Madara from the closed space of the primordial sphere.

It was at this moment that the Six Paths Sage appeared before the people and saw Senju Tobirama.

"After seeing the Six Paths Sage's Rinnegan, I fell into a deep sleep. When I regained consciousness, I saw you and Miwa Masayo Sage."

As a body of the Impure World Reincarnation, Senju Tobirama could not break out in a cold sweat, but the fear in his eyes was almost tangible.

He said to Uchiha You: "The Six Paths Sage gave me a terrible feeling. I even felt like I was a lamb to be slaughtered and the Six Paths Sage was the shepherd."

Uchiha You comforted him, "You don't have to worry about the Six Paths Sage in the Loulan Secret Realm, and this feeling is most likely because you are a dead person, and the Six Paths Sage is the master of the Pure Land."

"Once I have mastered the resurrection technique and you are alive again, Nidaime, we won't have to worry about the Six Paths Sage anymore."

After sending Senju Tobirama to rest, Uchiha You sat alone in front of the Gate of the World.

He thought silently, comparing Senju Tobirama's narration with his own memory, examining the differences between the two versions of the Fourth Ninja World War.

Uchiha You concluded that there was no difference between the two, and even if there were slight differences in the details, they were all within a reasonable range of error.

After all, there may be errors and inaccuracies in both his own memory and Senju Tobirama's memory.

Since there is no difference, it means that the major event that tore open a new parallel time and space occurred after Tobirama Senju was discovered by the Six Paths Sage.

Because the exact time is unknown, Uchiha You cannot determine which era is affected. It can't be that the Unburnable Era has been changed.

Whether it was true or not, he couldn't make a judgement, because after the Fourth Shinobi World War, nothing important happened in the Shinobi World.

In other words, the story has come to an end and entered a boring peace period. In peacetime, everything is always done according to routine, and it is almost impossible to tear apart parallel time and space.

The possibilities of the event that caused the time shock from the future are really slim.

Either something unexpected happened in the battle of the Valley of the End, and one of Uzumaki Naruto or Uchiha Sasuke died, or even both of them died, resulting in the loss of Konoha Village's deterrent power, and long-term peace did not come.

Either the Otsutsuki clan from outer space arrived early and started the interstellar war early.

Or maybe after the Six Paths Sage Otsutsuki Hagoromo learned about Uchiha Yu's information, he changed his mind and shifted his attention to the parallel universe.

Uchiha You had an urge to go to the future himself to see what was happening there, something he had no idea about.

But he quickly gave up this unreliable idea and turned to thinking about the next time-travel experiment.

Senju Tobirama gained a lot from this time travel. In addition to detailed information about the future, he also gained the cause and effect of the future Six Paths Sage, and a large amount of time travel data.

With these data, Uchiha You has a more thorough understanding of time and a more accurate positioning of parallel time and space.

Among the data related to time travel, one part is the soul change data of Senju Tobirama, which is very critical.

Senju Tobirama said that he studied his future self and thought that there was no mutual influence between himself and the future, but he was wrong.

The body and chakra were indeed not affected, but the entanglement of the soul was inevitable.

Senju Tobirama simply had no way of discovering it because his level was too low and he lacked his own data before the meal.

Uchiha You was strong enough and had complete data, so he easily discovered the changes in Senju Tobirama's soul.

He therefore deduced a method of soul crossing that was less consuming and less dangerous, using the attraction of time on identical souls to achieve soul crossing at the lowest cost.

He discovered that he could complete two journeys at the same time, one was the journey of the body, and the other was the journey of the soul.

The difference is that physical travel does not require consideration of the state of the target space-time, while soul travel can only possess oneself in the opposite space-time and merge temporarily.

This is a very restrictive way of crossing, and it is not suitable for a large group of people. Not much data can be obtained in a round trip, but the consumption is surprisingly small, and it is very cost-effective.

The most important thing is that to send the soul through time, the traveler does not need to come to the secret realm of Loulan himself.

Through the Divine Council of the Purple Mansion World, or by capturing souls through causal connections, Uchiha You can pull anyone in the Ninja World to the Gate of the World and send them out.

As for how soul travelers return... well, that's really a difficult question that requires research and experimentation.

Uchiha You fell into deep thought.

[Who can I trick into becoming the first test subject of soul traveling? ]

In fact, test subjects are not difficult to find.

The new system of Konoha Village was very successful. After the Fourth Hokage Orochimaru kicked away the daimyo and nobles and led the Konoha ninjas to directly take over the Land of Fire, he gained benefits beyond imagination.

A small portion of the new profits came from the nobles and daimyo in the form of taxes they had withheld in the past, amounting to about nine times the amount disbursed.

That's right, in the past, the tax revenues between the Fire Nation's ninjas and nobles were not divided 50-50, 30-70, or 28-20, but 190-190.

The ninja village that controls violence takes one, and the nobles who directly manage money take nine.

Of course, the nobles and daimyo said it was 40% to 60%, the ninja village took 6, and used this as an excuse to increase the difficulty for the ninja village to pay additional money.

The daimyos and nobles of the five major countries had a very good tacit understanding and silently abided by the two sets of accounts: the actual 19:1 and the apparent 46:1, thus confusing the five strongest Kage in the ninja world.

A weak position like Fengying will be deducted even more until there is nothing left.

Even a powerful figure like the Raikage could only get a 28% share at best, but he was portrayed as a "brutal", "dictator", and a madman who abused the nobles.

Of course, under the new system, taxes are just a small part of the equation.

Now the bulk of Konoha Village's income comes from industrial profits, that is, the infrastructure completed by the ninjas, which has provided a huge boost to the agricultural commerce of the Land of Fire.

The profits that Konoha Village earned from related industries were at least ten times the total amount of taxes.

The benefits of directly controlling the country are so huge that each ninja village began to follow suit.

But not all ninja villages can deal with the nobles.

The Hidden Cloud Village was already strong, and the Raikage simply killed all the nobles and monopolized the interests of the Land of Lightning.

The Hidden Mist Village and the Hidden Sand Village were severely weakened, but they no longer had internal divisions. They also successfully resolved the issue of the nobles and completed the transformation to the new system.

Only the unfortunate Iwagakure Village, due to the severe infiltration of the nobles, evolved into self-division, which led to the collapse of the entire country and even attracted the covetousness of Konoha Village.

In short, in the second wave of reforms led by Konoha Village, most of the ninjas gained huge benefits, but a small number of ninjas felt dissatisfied.

These ninjas were not dissatisfied with their income, but were dissatisfied with the increasingly peaceful living environment and the boring construction tasks.

There are very few people among humans who are born to be battle maniacs, and the proportion of battle maniacs among ninjas is much higher.

They want to fight strong enemies, long to bathe in blood, and long to experience the pleasure of killing.

These ninjas couldn't even hold back and threw themselves into the chaotic Land of Earth, enjoying the fun of fighting and killing.

What a perfect experiment.

As the Konoha ninjas entered the Land of Earth on a large scale, countless such battle maniacs were captured.

Ordinary ninja prisoners stayed in prisoner-of-war camps, but these battle maniacs and murderers could not be detained at will. Instead, they were transported thousands of miles to Konoha Village and detained in special prisons.

These scum who are not suitable for the new era will be used as human experimental materials by the Fourth Hokage Orochimaru, contributing their final value to the ninja world.

It's just that Orochimaru is too busy right now and doesn't have much time to do experiments, so he has accumulated a large amount of experimental supplies.

Each of these consumables is a demon that kills without blinking an eye, an unforgivable slaughterer, and they simply cannot be let go, but they are all ninjas who control chakra, so it would be a bit of a waste to execute them directly.

Orochimaru was very conflicted, and Uchiha You happened to come over and asked Orochimaru for test subjects to pay off his debts. He also specifically stated that the experiment was very dangerous and he wanted the kind of test subjects that were worth dying for.

The Fourth Hokage, who was heavily in debt, was overjoyed and happily sent him two hundred of them.

Uchiha You saved a lot of time by being able to exchange the uncollectible debts for these consumables, and he was very satisfied with it.

The experimental materials that were too much to use up and difficult to handle could actually be used to offset the debt, and Orochimaru felt like he had made a fortune.

It's really a win-win situation this time.

Captured Ninja: You guys win, we suffer!

But these ninjas are not wronged, because times have changed.

Konoha Village under the rule of the Fourth Hokage is the strongest and largest order system in the ninja world. In an ordered human society, some rules will become unbreakable iron laws.

Debts must be paid, murder must be paid with life.

When they wantonly killed ordinary people of the Land of Earth, they were destined to die a miserable death. To die in a time-travel experiment was also an amazing experience.

No matter how resentful and angry these guys were, they had no chance to resist at Uchiha You's hands and could only be "used" like little chickens.

When the experiment started, Uchiha You was pleasantly surprised to find that the energy consumption of soul crossing was really small, even less than one thousandth of that of physical crossing, not to mention any impact of the huge amount of chakra.

This cost advantage is so great that it can be said to be decisive.

Moreover, the return of the soul is more convenient and faster than the return of the body. The landing point will not be affected by the operation of time and space, and it can return to the body accurately.

The only problem is that the soul is fragile and may be destroyed at any time after being sent out.

There is no need for a huge earthquake to tear the new parallel time and space apart. Even if there is a more drastic fluctuation in time and space, or Uchiha You's own hand trembles, the pure soul will disappear into thin air.

In order to protect the fragile soul and increase the success rate of time travel, Uchiha Yu cooperated with Senju Tobirama to develop dozens of sealing techniques for soul protection.

During this period, they also developed a new forbidden technique.

Forbidden Technique: Impure World Reincarnation: Reincarnation

The function of this forbidden technique is very simple. It allows the soul of the Impure World Reincarnation to replace a new Impure World Body before the sacrifice used in the Impure World Reincarnation is completely damaged.

In this way, Senju Tobirama successfully "extended his life" and completely escaped danger. No matter what kind of backup plan the Six Paths Sage of the future Ninja World left behind, it would disappear with the destruction of the Impure World Body.

Senju Tobirama replaced his body with a new one, and just like Palu who was resurrected from the dead, his condition returned to its best, he was full of energy and could continue to work overtime.

Two guys get together, one has endless fantastic ideas, the other has countless brain holes, the collision of ideas inspires countless inspirations.

Moreover, Uchiha You rarely feels sleepy, and Senju Tobirama has unlimited energy and can work without rest, so the research progress is very fast.

Every day they would carry out three to five versions, and each time they would immediately verify it through experiments. After obtaining the results, they would immediately summarize and either improve the seal or start over again.

The intensity of the experiment was so high that the bloody test subjects were quickly consumed. Uchiha You had to replenish them twice and got all of Orochimaru's stock.

As souls were kicked into the world's gate one by one, Uchiha You's soul crossing technology steadily advanced, and its level of perfection quickly surpassed the physical crossing that he started with.

In the summer of the 48th year of Konoha, Tobirama Senju and Uchiha Yu performed 100 soul crossings in a row within 11 days, and all of them were successful.

A 100% success rate means that the development of soul crossing has been completely successful and can be officially applied.

Uchiha You began to consider which unlucky guy to choose to undergo the official soul crossing.

He had to consider it carefully, because official time travelers must be given freedom and the right to know, so that they could obtain the greatest possible intelligence benefits.

Therefore, the remaining experimental supplies are no good. Their resistance is too strong and their hatred is too deep. Once they are free, they will inevitably engage in crazy destruction.