When Natsuo opened his eyes, the shadow clone saw two red eyes with 3 tomoe each.
Quickly, the clone pulled a mirror from his pocket and Natsuo smiled when his experiment yielded the best results he had hoped for.
Sharingan
The ocular technique of the Uchiha clan and one of the most powerful bloodlines in anime.
Along with the Byakugan and Rinnegan, the three are known as the best ocular techniques in the world.
In addition to allowing you to see the opponent's chakra flow and know what type of technique they will use, it also grants incredible insight that allows you to see everything in slow motion and copy your opponent's movements.
In addition to that, it allows one to be skilled in Genjutsu, and few can be better at the art of illusions than an Uchiha.
Of course, besides the Rinnegan, which hasn't been seen in thousands of years and is believed to be fake, and the Byakugan, which all members of the Hyuga clan can awaken, the Sharingan is awakened by only a few Uchiha.
To awaken the Sharingan, a member of the Uchiha clan must experience intense emotions such as the loss of a loved one or despair. Therefore, very few could awaken the Sharingan in their lifetime compared to the entire clan population.
But even so, it was enough for the Uchiha clan to be recognized as the strongest clan alongside the Senju clan.
Looking at his eyes in the mirror and quickly checking his body, Natsuo let out a sigh of relief when he found no negative aftereffects.
Taking Itachi as an example, many speculated that awakening the Mangekyo Sharingan at a young age was the reason he became ill later in life. Therefore, awakening the Sharingan at a young age was detrimental, severely affecting the body.
Natsuo wanted to be careful, so he made sure to train his body first before attempting to awaken the Sharingan.
With a thought, the shadow clone beside him disappeared and Natsuo received his memories.
Natsuo quickly reviewed them and knew that the theory was correct.
When the clone became aware of the changes in his brain and eyes, he registered the effect of the Sharingan awakening on his body.
At first nothing happened and he awakened the Sharingan without problems.
Gradually, his eyes gained more tomoe and quickly his eyes each had 3 tomoe.
But the strange chakra still did not stop because of the intense emotions he was feeling and was forcing his eyes to continue evolving.
This is where an imbalance occurred in his chakra.
Chakra is composed of physical and spiritual energy, with the proportions between the two varying from person to person. The proportion of chakra determines a ninja's aptitude for techniques that utilize Yin or Yang chakra.
Of course, the chakra remains both physical and spiritual energy, so there is still a balance within the body. This balance is gradually disrupted as the Sharingan evolves.
That change within the chakra is minimal and would not attract the attention of the Uchiha because they would see it as something natural when the Sharingan evolves.
But thanks to his ability to 'see' at a nanometric level with his chakra and the fact that all changes are stored in his mind palace, Natsuo was able to realize the effect of such a chakra imbalance on the body.
And when his 3-tomoe Sharingan was about to evolve to the level of Mangekyo Sharingan, he realized that his spiritual energy began to grow at the expense of his physical energy, damaging his body in the process.
When his clone realized this, it interrupted the evolution of his eyes and woke him from his self-imposed Genjutsu.
While it was good news for Natsuo to awaken the Mangekyo Sharingan, it wasn't worth it if it affected his body and left severe long-term consequences.
Since he was not in immediate danger, Natsuo preferred not to awaken the Mangekyo Sharingan yet, and the shadow clone knew this.
So when he saw that his body was being damaged while his eyes continued to evolve, the shadow clone interrupted the process and Natsuo broke free from his self-imposed Genjutsu.
This self-imposed Genjutsu only worked because the shadow clone trapped him in his mind; otherwise, he would know it wasn't real, and the process to awaken the Sharingan wouldn't work.
Fortunately, Natsuo's theory—that only strong emotions were required, and not necessarily negative ones—worked. Now he could awaken the Mangekyo Sharingan in the future without having to lose or kill someone important to him. Otherwise, it wasn't worth it, and Natsuo preferred not to awaken the Mangekyo Sharingan.
Since he could already defend himself with the 8 inner gates and the breathing of the 7 heavens, Natsuo was not in a hurry.
And if in the future those techniques were not enough to reach the level of the 6 paths, Natsuo would embark on a journey around the world to gather the chakra of the 9 tailed beasts.
Even if he didn't have the Gedo Mazo, Natsuo just wanted to fuse the chakra of the 7 elements and together with Senjutsu, he would obtain the Senjutsu chakra of the six paths.
Fortunately, intense positive emotions also worked, and Natsuo was confident that he would awaken the Mangekyo Sharingan in the future.
As long as he can obtain a clone of White Zetsu or cells from the First Hokage, he will also be able to awaken the Rinnegan.
Of course, neither option was easy, but they existed, and Natsuo could wait for the future to choose.
Seeing the two shadow clones back in the room, Natsuo ordered them to perform some actions, and they obeyed.
With his new eyes, Natsuo could see their movements in slow motion and the flow of chakra within their bodies.
And while all this was happening, the chakra in his own body was being consumed to keep the Sharingan activated.
With a thought, Natsuo took control of his chakra and its consumption was reduced.
Thanks to his chakra control training all these years, Natsuo's chakra control was terrifying.
Even the best medical ninja in the village didn't have Natsuo's level of chakra control. This was because Natsuo never stopped increasing the difficulty of his chakra control exercises, while other ninjas stopped when they thought they had reached their limit.
In just one second, Natsuo's chakra consumption dropped to the optimal level for maintaining the Sharingan activated. And lifting the mirror, he saw the changes in his eyes as he further reduced his chakra consumption.
During the process, Natsuo felt that his chakra did not want to follow the same paths and deactivated the Sharingan, so he used his great chakra control to prevent that.
3 tomoe, 2 tomoe y 1 tomoe.
In the end, Natsuo was able to reduce the number of tomoe in his eyes to the minimum and let out a smile because he could hide the true level of his Sharingan if he was forced to use it in an emergency.
If Natsuo did not have great chakra control, his Sharingan would always activate with 3 tomoe and would deactivate if the chakra in his eyes decreased below a certain level.
During the next few hours, Natsuo spent his time practicing his control over his Sharingan and the effects on his current abilities and the shadow clones disappeared when he went down to dinner.
After dinner, Natsuo did not go back up to his room and spent the night playing and talking with the other children.
Natsuo was happy to awaken his Sharingan and his good mood was noticed by the others.
After a few hours, the children went to their rooms and the lights went out.
In his room, Natsuo climbed onto his bed after taking a bath and stretched out his hands and feet before closing his eyes.
Since he was going to try to awaken his Sharingan today, he hadn't created too many shadow clones. Just the necessary ones.
So there were no shadow clones practicing Fuinjutsu and Elemental Chakra Transformation.
Speaking of the latter, Natsuo was now able to transform his chakra without hand seals into the elements of fire, wind, and earth, and about 2 months ago he began training the elemental transformation of the water element.
Besides the shadow clones used to awaken his Sharingan, Natsuo had only created one more clone.
And the task of this shadow clone was very important to Natsuo.
Feel the natural energy.
The reason Natsuo wasn't so worried about awakening the Mangekyo Sharingan with the next world wars approaching was because of the advancements of this shadow clone.
Deep inside and well hidden in the forest, a shadow clone of Natsuo meditated while feeling the natural energy around him.