After a few days of cultivation, Yamanaka Yuan recovered from the effects of using the [Ice Colossus].

The [Ice Colossus] technique is a big burden for the current Yamanaka Yuan. It is not a simple matter to control such a huge amount of natural energy, which not only requires strong mental power, but also requires great physical fitness.

Yamanaka Yuan uses his body as the core to build the [Ice Colossus], and then the whole body is integrated into the Colossus, which can perfectly control the [Ice Colossus] but requires a lot of physical strength and chakra.

A few days ago, Yamanaka Yuan only lasted 10 minutes of [Ice Colossus] and spent a lot of physical strength, with the support of natural energy in the Colossus, he didn't feel anything wrong, and after the Colossus was lifted, Yamanaka Yuan found that he had lost his strength.

The overdraft of physical strength made it impossible for Yamanaka to condense even the chakra. He lay in bed for several days to get out of this detached state, and the chakra's condensation returned to normal.

In addition to these bad effects, Yamanaka also found that because his body was directly integrated into natural energy, the amount of chakra had increased a lot, and now it could be compared to the average elite Shangnin.

The first thing Yamanaka Yuan did after his body recovered was to refill the [Yin Seal] with natural energy, without the natural energy in the [Yin Seal], not only could the immortal mode not be used, but the Ice Escape Ninjutsu would also consume a lot of chakra.

Both Hachiki Sakumo and Jiraiya knew that Yamanaka needed time to recover, and besides, there had been no change in the recent years, and he didn't need Yamanaka's help.

The natural energy of the Konoha camp was far less abundant than that of Myoki Mountain and Konoha Village, and it took nearly a month for Yamanaka to fill the [Yin Seal] with natural energy.

After the [Yin Seal] was filled, Yamanaka Yuan began to continue to explain the medical theories of his previous life to the medical ninjas.

In the last war, the medical ninjas found this special medical ninjutsu taught to them by Yamanaka Haruka very useful.

Several medical ninjas used the methods taught by Yamanaka Yuan to save many ninjas whose hearts had stopped beating.

They never thought that the method of stimulating the heart with thunder could actually restore the beating of the heart that had stopped beating, and they never thought that simply pressing the chest cavity could achieve the same effect.

Now the medical ninjas are full of interest in the special medical ninjutsu taught by Yamanaka Hara.

Yamanaka's lectures attracted more and more people, not only medical ninjas, but also some ordinary ninjas who began to come to observe, and many of the things Yamanaka mentioned benefited them a lot.

On this day, an uninvited guest came to the class in the middle of the mountain, Uchiha Fugaku.

In order to explain the hair color problem, Yamanaka Yuan lied to Uchiha Fugaku that his father was from the Nara clan.

Although Yamanaka had already explained his hair color, Uchiha Fugaku was skeptical, but he couldn't force him to ask.

You must know that Yamanaka is the leader of the medical team in the Konoha camp and one of the decision-makers of the war. Besides, don't talk about these things, just talk about strength, Yamanaka Yuan is much higher than him.

Faced with a person with a higher status than him and a stronger strength than him, Uchiha Fugaku even if he had doubts, there was nothing he could do with Yamanaka Yuan, and later he learned that Yamanaka Yuan opened a class in the camp to teach medical ninjas medical ninjutsu, and allowed other people to observe, Uchiha Fugaku came to Yamanaka Yuan's class with the idea of trying his luck.

The atmosphere in the class was very lively, not only medical ninjas, but also many ordinary ninjas in Konoha, and Uchiha Fugaku sat down in an inconspicuous corner.

Yamanaka didn't find Uchiha Fugaku, and he was talking about heredity today.

Speaking of heredity, we have to mention the blood inheritance limit in the Hokage, except for the owner of the first generation of blood inheritance limit who developed it himself, the blood inheritance limit of later generations comes from heredity.

Yamanaka Haruka combined the knowledge of genetics with the blood limit in the Hokage, and the ninjas listened to it with relish, and even Uchiha Fugaku was a little fascinated.

"Is Yamanaka Yuan here?" A sudden voice interrupted the ninjas' thoughts, and Yamanaka's lecture stopped.

The ninjas were a little angry, and it was okay to disturb them to listen to the class, but they were still so disrespectful to the Grand Master. The ninjas turned around together, only to see a member of the Shadows.

"Yamanaka Yuan, this is what Hokage-sama gave you." Ignoring the ninjas' eyes, the members of the Shadows handed a scroll with a seal to Yamanaka. After Yamanaka took the scroll, the Shadow Ninja used the Instant Movement to leave.

"Everyone, I'm sorry, let's continue!" Yamanaka put the scroll into the ninja bag he was carrying, and continued his lecture.

The lecture on genetics lasted a full 2 hours before it ended. After many ninjas left, COSCO found Uchiha Fugaku in the corner, Yamanaka Yuan didn't want to take care of Uchiha Fugaku, so he packed up his things and turned around and left.

"Far! You wait. Seeing that Yamanaka was about to leave, Uchiha Fugaku hurriedly stopped him.

"What's the matter with you?" Yamanaka's indifferent appearance made Uchiha Fugaku a little embarrassed, he was also a genius of the Uchiha clan, he had a three-hooked jade writing wheel eye at a young age, and he was highly respected wherever he went, and Yamanaka's attitude made him very unaccustomed.

"Yuan, I don't have anything else to do, I'm just interested in the genetics you just talked about." Uchiha Fugaku is worthy of being the person who can become the head of the clan in the future, and the city is very deep, and in the face of Yamanaka's coldness, he cleverly diverted the topic.

"If you don't understand anything about genetics, you can continue to come tomorrow, now I have something! Let's go first! After saying that, he left without looking back.

Yamanaka returned to his tent and took out the scroll that the three Hokages had given him. Part of the reason for Yamanaka's words just now was to get rid of Uchiha Fugaku, but more importantly, he was in a hurry to come back and see the scroll that the three generations of Hokage had given him.

When he took over this scroll, Yamanaka Yuan found that the scroll sealing technique given to him by the third generation of Hokage used the [Four Elephant Seal], and it was worth using the scroll of the [Four Elephant Seal], which was definitely not simple.

Yamanaka Yuan unlocked the seal on the scroll and opened the scroll, which contained a letter and two small scrolls.

Yamanaka opened the letter first, the content of the letter began with some unnutritious greetings, the middle part praised him for his outstanding performance in these two battles, and ended with the reward given to him, two S-class water escapes developed by the second Hokage.

These two techniques are [Water Escape. Hard Vortex Water Blade] and [Water Escape. Water Dragon Bite Explosion] is the strongest water escape ninjutsu of the second generation Hokage during his lifetime.

The second generation of Hokage Thousand Hands has invented many ninjutsu in his life, [Shadow Clone], [Flying Thunder God], and [Filthy Earth Reincarnation] were all developed by him.

Although Senju has developed many ninjutsu, he is best at water escape. Legend has it that the second Hokage made a contract with the sea to unleash a powerful water escape where there was no water.

The three generations of Hokage would actually give the two S-level water escapes between the thousand hands as a reward to Yamanaka Yuan, which made Yamanaka Yuan a little unexpected, and the three generations of Hokage would be so generous.