Konoha, reported by the Fourth Hokage at the beginning

As we all know, taking over another person's body will cause an immune response.

The soul-transforming art of possession is about taking over another person's body, which results in the rejection reaction causing the person to die soon after.

The reason why the third generation kept asking Li Yao about the improved version of the spirit transformation technique was because there was no rejection reaction after Li Yao took over Kimura Yao's body, which made the third generation think that the spirit transformation technique that Li Yao knew was an improved one that would not have any rejection reaction and could be used to continuously take over other people's bodies to achieve immortality.

Li Yao only knew these after obtaining Kato's broken memories.

Li Yao was also unable to resolve the body and soul rejection reaction after taking over another body using the Spiritualization Technique.

The secret reincarnation technique developed by Orochimaru later also could not solve this rejection reaction. He had to change his body every three years, otherwise both his soul and body would suffer great damage, and eventually the body would die and the soul would dissipate.

The relationship between the flesh and the soul is like the relationship between armor and the body.

The soul changes bodies just like the body changes armor.

If you wear ill-fitting armor, it will cause harm to your body and will continue to cause harm.

This is the principle of rejection reaction of the body and soul.

Neither the spirit transformation technique of possession nor the reincarnation technique developed later by Orochimaru could solve this side effect.

However, Kakuzu's secret technique of Earth Grudge solved this problem.

When Kakuzu takes another person's heart, the black line of the Earthly Blame will transform the other person's heart and assimilate it into a heart that can be controlled by the Earthly Blame.

The most amazing thing is that the transformation does not affect the lifespan of the heart. The heart can beat for the same number of years as it originally did after the transformation.

"Assimilation...is indeed the best way to resolve the body's rejection reaction."

Li Yao looked thoughtful, wondering if he could combine the Earth Resentment Secret Technique with the Spiritualization Technique to develop a technique of possession without the side effects of rejection.

Compared with the immortality of taking over another's body through the spirit transformation technique, Li Yao looked down upon the immortality of Di Yuanyu.

The fatal weakness of the main heart is too deadly.

And the chakra properties are completely dependent on the heart.

One heart can only use one chakra attribute, which is too restrictive.

Of course, there are some disadvantages to the spirit transformation technique of possessing another's body.

If the two are combined, it is possible.

"Okay, let's develop it!"

Li Yao made a decision in an instant. Who doesn't desire eternal life? It would be fine if he didn't encounter it, but how could he ignore it if he encountered it?

But there is no rush now, perfect transformation is still Li Yao’s top priority.

"Uncle, your sensory deprivation technique is amazing!"

At this time, Xiao Ye fell from the sky and looked at Kakuzu lying motionless on the ground. A hint of frustration flashed in his envious eyes.

Li Yaoying's clone taught her this powerful sensory deprivation technique, but she just couldn't learn it.

Li Yao stepped forward and picked up Kakuzu's other heart. He held both hearts in his hands at the same time and activated the Devouring Seal Array to devour the chakra in the hearts.

"If you can't learn it, just work hard to improve the ninjutsu you have learned." Li Yao said to Xiao Ye with a smile while devouring Kakuzu's heart chakra.

Compared to the Dark Walk Technique, the Perception Deprivation Technique is much more difficult.

Not only does one need to have the ability to sense the weak chakra of the brain's nerve conduction system, but one also needs to have the ability to control the chakra so meticulously that one can accurately intercept the signals of each nerve vein, especially the precise control of illusion chakra.

In this world, perhaps only Li Yao, whose consciousness mutated after traveling through time, can perform the technique of sensory deprivation.

Speaking of consciousness mutation... Li Yao's expression suddenly paused, and his eyes flickered slightly.

He seemed to understand why there was no rejection reaction between his body and Kimura Yao's.

Because his consciousness or soul mutated after traveling across time.

For other people, taking over another person's body is like changing into a set of ill-fitting armor, and they will naturally be hurt.

However, after Li Yao's soul mutates, it may change its soul size to match the armor, so his soul will match Kimura Yao's body without causing any rejection reaction.

"Is that right?"

Li Yao was a little unsure, but deep down he felt that this was the way it should be.

If this is true... does that mean that he can now use the spiritualization technique of possession to take over another person's body, and his soul will automatically change to match that person's body, so that he can continue to live in that person's body.

"This……"

It has to be said that this is a great temptation, but Li Yao dare not experiment. If he dies, it would be an unjust death.

But... you can try it when you are really in desperate situation.

After a while, the chakras in Kakuzu's three hearts were all sucked dry by Li Yao. For an alternative chakra creature like Kakuzu, having his chakra sucked dry meant death.

From then on, a legend was lost.

This is the first character that Li Yaosha has an appearance in the original novel.

Kato definitely doesn't count, he is a character living in memory, and he was not killed by Li Yao, but he committed suicide.

Li Yao didn't feel much about killing the original characters.

When he read fan fiction in the past, he always felt uncomfortable because the protagonist let the original characters go for inexplicable reasons.

Now he understood the fan fiction a little bit.

Because once the original character died, the plot about him could not be developed.

It's the same now. Kakuzu is dead, and in the future Asuma... well, he still has to die. As long as Li Yao is around, Asuma still has to die, but Li Yao will let him marry a wife and watch how he makes his wife pregnant before dying.

For three generations of family members, Li Yao always cares about whether they have experienced enough "good" memories when they die.

"Let's go, let's go to the Water Kingdom!"

Li Yao called Xiao Ye, and the two headed eastward to the Water Kingdom.

The ninja world will definitely be completely changed under his influence, and the future will definitely not be the same as Li Yao remembers.

Only by improving his strength can he survive well in this world and continue to torture three generations until eternity.

The last time the Five Kage surrounded him, he had already copied the Third Tsuchikage Ōnoki's Dust Release and the Raikage's new Lightning Release chakra mode.

The only thing he hadn't copied was the Third Kazekage's Magnetic Style - Iron Sand Secret Technique and the Third Mizukage's Water Style - Black Water and Water Transformation Technique, which was like the deep sea water pressure.

This time, I will go to the Land of Water first to copy the ninjutsu of the Mizukage, and then go to the Land of Wind to copy the magnetic escape technique of the Third Kazekage.

Along the way, Li Yao encountered ninjas, no matter they were wandering ninjas or ninjas carrying out missions from the five major countries, he took them all down, using the spirit transformation technique to possess their spirit body to sense their soul and mental energy, and find out the difference between their mental energy and his own.

Unfortunately...the expected rapid progress did not occur.

He has never been able to sense the difference in spiritual energy between people. He can clearly sense the difference between souls, but he cannot distinguish the spiritual energies.

There was no choice but for Li Yao to continue.

In this way, after stopping and starting along the way, it took Li Yao and Xiao Ye more than half a year before they finally set foot in the Water Kingdom.

Chapter 178 Spiritual Energy Fluctuation

The land of water.

A country made up of many islands.

The main population lives on the largest island in the middle of the archipelago, where the Hidden Mist Village is also located.

Although we know the general information, it is not easy to find the Hidden Mist Village in the vast ocean.

Flying all the way, Li Yao and Xiao Ye found the Kirigakure outpost on a small island, which was an observation station responsible for detecting the enemy, similar to Konoha's border patrol.

There are six ninjas on the island, three in each team. One team of three is using telescopes to observe the surrounding sea in various places on the island, and the other team of three is resting.

"Wait for me up there."

"Okay, uncle."

Xiao Ye nodded. Along the way, Li Yao's strength had already gained her full trust. No matter who the ninja was, they were no match for the uncle.

Li Yao fell from the sky, and two paper wings condensed behind him, allowing him to fly slowly down.

Paper escape is a special escape technique. When using paper escape chakra, a person's weight can become as light as paper, allowing them to float in the air. With paper wings, they can fly freely.

"What……"

When Wuyin on the island discovered Li Yao, it was too late. Under the perception deprivation technique, none of the six people were spared and they all lay motionless on the ground.

Clank... Six black iron chains flew out from Li Yao's body, drawing six Kirigakure ninjas from various places on the island towards Li Yao.

"It's still the standard arrangement of two men and one woman."

In front of Li Yao, six Kirigakure ninjas were lying neatly on the ground. Two of them were female ninjas with charming faces and good looks, and their figures were impeccable.

It's amazing to say, so far, all the female ninjas Li Yao met, even the third-generation wife, had good looks and figures, especially their figures. There was not a single female ninja with a bad figure.

The two female ninjas from the Hidden Mist Village at the moment, with their long black straight hair that falls to their shoulders, faces as delicate as water, and sexy bodies with curves in every shape and size, perfectly embody what a woman should be like.

However, judging from the temperament between their eyebrows and eyes, they should still be girls who have not yet reached adulthood. The two girls are not very old, around eighteen or nineteen years old.

At this age, to be able to survive the Second Ninja World War, he should have had good strength and luck.

Unfortunately, I met Li Yao.

Just when Li Yao was about to devour the chakras of the six people, looking at the two female ninjas from the Hidden Mist who had good looks and figures, his expression suddenly froze and he thought of something.

"How about...try to see if the mental energy will be different when you are emotionally excited."

Li Yao's heart moved, thinking it was very likely. Before, he used the perception deprivation technique to deprive others of control of their bodies and then possessed them with his spirit to penetrate their souls and perceive their spiritual energy.

In that situation, people's mental and emotional fluctuations are not strong.

If the enemy is put under drastic mental and emotional fluctuations, perhaps he will be able to perceive the difference in mental energy more clearly.

Li Yao immediately released most of the six people's body perception control and only locked their ability to move. At the same time, he used sealing techniques to seal the six people's chakras, making it impossible for them to perform ninjutsu.

Afterwards, Li Yao created two shadow clones and had them do some unspeakable evil things to the two Kirigakure ninjas. He himself used the spirit transformation technique to possess one of the ninjas and feel her spiritual energy when her emotions fluctuated violently.

"I don't know if this counts as messing with yourself?"

This thought suddenly flashed through Li Yao's mind, but he quickly dismissed it.

This definitely doesn't count as him fucking himself. He didn't take over the female ninja's body, so he couldn't feel the pleasure coming from her body.

He will only focus on the spiritual perception of the soul.

"asshole!!!"

"Let me go, who are you...ah..."

"I'm going to kill you!!!"

The evil began, with all kinds of curses coming out of one female ninja's mouth, while another female ninja remained calm, just gritted her teeth and stared at Li Yao with angry eyes.

Li Yao remained unmoved and continued his evil deeds.

To be honest, if this kind of evil happened in modern times, Li Yao would definitely be a big devil that everyone despises.

It's a pity that no one can control him in the Naruto world, and he does whatever he wants in order to develop the perfect transformation technique.

An hour later, just when fireworks were going off in the heads of the two beautiful Mist Ninjas, Li Yaoying's clone ended the lives of the two women in an extremely rational manner.

Under the multiple shocks of extreme joy and death following fear, anger and other emotions, the two women's emotions fluctuated more violently than ever before.

At this moment, Li Yao's mind was also focused to the utmost.

Ding... Li Yao's spirit body, which was possessed by a woman's body, suddenly condensed. He seemed to have noticed at that moment that the female ninja's spiritual energy emitted fluctuations that were different from his own.

He quickly concentrated all his attention on finding that different fluctuation of spiritual energy.

But... that trace of different mental energy fluctuation seemed to appear for only a moment, and it was not obvious. Li Yao could only sense that different mental energy fluctuations had appeared, but he could not sense specifically where that trace of different mental energy fluctuations were different.

"Just a little bit closer!"

Li Yao's spirit left the female ninja's body and floated in the air with a gloomy look on his face, feeling secretly regretful.

But soon, Li Yao let go of the regret in his heart.

He turned his attention to the other four Kirigakure male ninjas.

"How about... meet the man head on?"

This idea suddenly popped up in Li Yao's mind. After all, it was the shadow clone who went to meet the man, not him. When the time comes to get rid of the shadow clone, he just needs to delete all the memories of the shadow clone. He will not get any memory experience of the shadow clone going to meet the man.

"My Master, I advise you to be kind and behave like a human being!"