After that, Yamanaka kept injecting natural energy into the [Yin Seal], and it took nearly 10 days for the natural energy in the [Yin Seal] to reach saturation.

The external natural energy attracted by the special natural energy separated by the mountain was sometimes more and less at each time, and it was not fixed, so it took three days longer than expected.

But even so, Yamanaka Yuan had to sigh at the terribleness of nature, it would take at least two years for a person to accumulate the [Yin Seal] with chakra, and it would only take 10 days to fill the [Yin Seal] with natural energy.

And Jiraiya was full of disdain for Yamanaka's statement, in his opinion, Yamanaka's infusion of natural energy into the [Yin Seal] and the ninja's accumulation of chakra to fill the [Yin Seal] were completely two different concepts.

One is that natural energy is inexhaustible, while ninja chakra is limited. The second is that chakra can release ninjutsu, which is much more effective than natural energy. In Jiraiya's opinion, it is much more practical to fill the [Yin Seal] by chakra than to fill the [Yin Seal] with natural energy.

When Yamanaka poured a huge amount of natural energy into the [Yin Seal], he gradually understood that Jiraiya's words were inexhaustible, as he said, natural energy was inexhaustible.

Because the natural energy in Mt. Myoki cannot be felt to decrease no matter how far away the mountain is consumed.

After the [Yin Seal] reaches saturation, Yamanaka Yuan enters the ice elementalization, liberating the natural energy in the Yin Seal, and the natural energy flows in from Yamanaka's arm.

The mountains released water turmoil, and the ice did not consume the chakra; Unleashing the Water Dragon Bullet, the Ice still does not consume Chakra.

After Yamanaka Yuan turned off the [Yin Seal] natural energy output, just now he opened the [Yin Seal] for about 10 minutes, and the natural energy in the [Yin Seal] consumed one-fifth, most of which was dissipated in the air, and only a small part was used by Yamanaka Yuan.

In other words, it takes 10 days to accumulate natural energy, and you can use the ice escape for about 50 minutes without consumption.

The problem of the frozen ninjutsu that had plagued Yamanaka for nearly 4 years and consumed a lot of chakra was finally successfully solved.

After solving the ice escape problem, Yamanaka Yuan decided to start cultivating the Immortal Mode.

The main reason why he couldn't enter the immortal mode was because he absorbed the natural energy of the outside world too quickly.

The mountains are far from having time to fuse physical energy, spiritual energy, and natural energy in a ratio of 1:1:1 to produce immortal chakra.

Therefore, Yamanaka Yuan wanted to try to use the same size of physical energy and spiritual energy as that special natural energy to fuse with it to see if he could produce immortal chakra. If you can produce Immortal Chakra, open the [Yin Seal] to replenish the consumption of natural energy.

In the original book, Fukasaku Immortal said that ninjas can easily distinguish between physical energy and spiritual energy because of the use of ninjutsu. Yamanaka can do it even after his practice.

He channeled the physical energy and spiritual energy that were about the same size as the natural energy, and controlled the fusion of the three.

After the three strands of energy reached one-third of each, they began to slowly merge. A special chakra was born from the far body of the mountain.

"This is the Immortal Chakra?" Orange-red eyeshadow began to appear on Yamanaka's face, because it was a natural chakra perceived using the toad oil of Mt. Myoki, and the face of the immortal was the same as Naruto's.

Yamanaka felt the changes in the chakra in his body, and as said in the original book, the amplification effect of the immortal mode was indeed obvious. Yamanaka's ability to perceive and his physical flexibility have been greatly enhanced.

Yamanaka Yuan opened the Thunder Chakra Mode, and at the same time unlocked the [Yin Seal] Thunder Chakra Mode released by the Immortal Chakra after experiments, and the speed and strength have been greatly improved, and it has completely surpassed the speed of the Ice Thunder Mode.

"[Immortal Law. Rachel] "Yamanaka Yuan injected immortal chakra into Rachel, and Rachel became weak and inaudible in terms of size and power, and even his voice became weak and inaudible when he cast the spell.

In the original book, Kai said that [Chidori] was a technique created for assassination, but whether it was [Chidori] or [Rachel], most of the time it was used in stabbing.

And when Yamanaka learned [Chidori] and [Rachel], he understood why this technique could not be used as an assassination. Because the sound of the spell is too loud.

As its name suggests, the Thousand Birds technique is like a thousand birds chirping, and although Rachel has improved, it has not been perfected.

Yamanaka Yuan added the Immortal Chakra to [Rachel], and [Rachel] can already be used in assassination.

After about 1 minute, the immortal mode in the mountain was automatically lifted, and as Fukasaku Immortal said, Yamanaka's age was too young, and the amount of chakra was insufficient. Although he had the [Yin Seal] to replenish the consumption of natural energy in his body, his own state could not maintain the immortal mode for long.

After his physical condition recovered, Yamanaka Yuan entered the immortal mode again. This time, he didn't release [Rachel], he didn't turn on the Thunder Chakra mode, and the immortal mode in the far reaches of the mountain maintained less than 2 points.

After another experiment, Yamanaka Yuan used [Rachel], Thunder Chakra mode, and [Thousand Bird Blade] three techniques in the immortal mode. The Immortal Mode lasted less than 1 minute.

After determining the duration of his immortal mode, Yamanaka Yuan stopped cultivating. After that, he needs to consult Fukasaku Immortal about the combat method of the Immortal Mode.

The next day, Yamanaka Yuan found the Fukasaku Immortal who guided Jiraiya's cultivation.

Jiraiya still hasn't been able to find a way to become one with nature, and this Fukasaku Immortal can't help, so he can only let Jiraiya understand it himself.

"Yuan-chan, what's the matter?" The arrival of the distant mountains in the mountains has been sensed by the Fukasaku Immortals.

"Fukasaku Immortal, I want to learn from you how to fight in Immortal Mode." Yamanaka Yuan directly explained the meaning.

"Yuan-chan, didn't I say that! You can't get into immortal mode, you're ...... What the? ”

Before the words of the Fukasaku Immortal were finished, Yamanaka Yuan entered the Immortal Mode, and both Fukasaku Immortal and Jilai looked at Yamanaka Yuan in amazement.

Fukasaku Immortal was shocked by Yamanaka's more perfect immortal mode, originally he concluded that Yamanaka was far from being able to enter the immortal mode, but he didn't expect Yamanaka Yuan to succeed, and the immortal mode was much more perfect than Jilai.

It was only after that Fukasaku Immortal noticed the natural energy flowing from the [Yin Seal] in the far reaches of the mountain.

"Yuan-chan, are you absorbing the natural energy of this sealing technique?"

Yamanaka was far from revealing the special natural energy in his body to the Fukasaku Immortal. Therefore, when the Fukasaku Immortal noticed the natural energy flowing out of Yamanakayuan's [Yin Seal], his brain supplemented Yamanakayuan's method of controlling the flow of natural energy into his body by relying on this sealing technique.

Yamanaka didn't speak and nodded.

"Little ghost, how long can your immortal mode last?" Jiraiya asked.

"It doesn't take 2 minutes for any ninjutsu."

"Yuan-chan, your chakra is too small. In the future, it is better to use the immortal mode sparingly, and when you grow up, the amount of chakra becomes sufficient to use. ”

"Yes, Fukasaku Immortal."

"But Yuan-chan is really a genius, he can actually come up with this method of controlling the flow of natural energy into the body." Fukasaku Immortal sighed.

"Boss, you're wrong. Genius me, thanks to me helping this little ghost rewrite the sealing technique, he was able to enter the immortal mode. After saying that, he laughed arrogantly.

"Jiraiya-chan, you can't even enter the immortal mode by yourself, and you don't want to refuel and cultivate?"

"Yes, Boss." Looking at the face of the deep immortal who was not good, he was also stunned.

"Yuan-chan, I'll teach you the physical skills of the immortal mode."

"Yes, thank you Fukasaku Immortal!"

PS: The author specifically went to understand that the creation and regeneration of Tsunade and Sakura is the effect achieved after the Seal of Baihao releases the chakra with all its might. And the release of the Seal of Baihao is controllable.