Reborn as Madara's grandson in Naruto

A boy with fair skin and spiky black hair with a touch of blue was lying lazily on the grass. He wore a black t-shirt and black pants with the Uchiha crest printed on the back. The boy has black eyes and golden pupils. He lay lazily on the ground, one leg crossed, lost in thought.

His eyes changed, and a Sharingan appeared in both eyes. His Sharingan was different from usual, it no longer had the usual black pupils; his Sharingan had a golden pupil. The sclera and cornea of ​​his Sharingan are normal, the only difference is the golden pupils and silver irises, which are very similar to his normal eyes. The boy began to murmur to himself,

"It has been three years since I was reborn into this world. A lot has happened in these three years."

"Shisui was born one month later than me. It took my father nine months to recover from a coma. For nine months, my mother took care of me with Uncle Yagami and Aunt Fumiko. Aunt Fumiko's brother Fugaku was a year Before I became the clan leader, my grandfather passed away unexpectedly.”

Recalling these things, Izuna sighed.

"Uncle Fugaku is marrying Aunt Mikoto in six months. That wedding is too much trouble."

Izuna stroked his cheek, remembering the old henchmen of the Uchiha clan who kept tugging on his cheek. He shuddered when he felt that way because it was one of the worst days he'd ever had. Looking at Shisui who was playing with toy shuriken and kunai, he sighed.

"I wonder how this little guy deals with all those aunties and grandmothers. Damn! Even the children's toys of this world are kunai and shurikens. I miss those days of playing with small remote control cars.

Izuna shook his head, recalling more memories from the past three years.

‘Recently, I saw some changes in Aunt Mikoto’s chakra. When I secretly activated my X-ray vision to examine her uterus, I was able to see the embryo forming. So, that means Weasel will be born within the next eight months at best. The third Ninja War will begin in the next five years, and I will have to train harder in the future.

Izuna couldn't help but sigh as he recalled the progress made in the past three years.

"I was able to awaken my Sharingan at birth, but it took me three years to evolve it into the two-winged Sharingan. Part of the reason was that I was under constant surveillance by my parents and couldn't keep it active all the time. I didn't want my Parents are frightened when they see an awakened Sharingan in their newborn baby.

‘In addition, the pupils of the Sharingan are golden with silver irises, perhaps it is a mutation given by God. In addition, my Sharingan is the same as Madara and Sasuke's, and even my dad's Sharingan is also a Changyou. Well, it probably has something to do with dad and I being part of Madara's bloodline and Sasuke being the reincarnation of Indra. In my free time without any parental observation, I would practice my Sharingan and successfully evolved it into two tomoes by holding it.

I have a lot of chakra, so constant use of the Sharingan has no negative effect on me. But the most depressing thing is that I can't practice ninjutsu and chakra control techniques. My body was still that of a three-year-old boy, and despite having a healing factor that rivaled Hashirama's, it couldn't handle the stress of my massive chakra reserves. I am not a masochist who will suffer needlessly to gain a modicum of power while greatly damaging my body. My medical knowledge from past lives helps a lot here, as I can easily identify any abnormalities in my body through my Sharingan and act accordingly.

Except for the chakra net, there is no big difference between the bodies of people in the ninja world and those in my hometown. I assume that the chakra network is similar to the body's circulatory system, which circulates chakra through the body rather than the blood, and a person can release chakra through his tenketsu points. To confirm my analysis, I used my Sharingan to surreptitiously examine civilian corpses. There is no essential difference between their bodies and those of ninjas. Only civilians' bodies cannot use chakra, either because they don't have enough chakra, or because their chakra network is blocked.

To unlock one's chakras, one must flow his chakras in a specific way so as not to damage the chakra meridians. This whole ordeal looks like cultivation shit to me. Closer to home, I did not unlock my chakra because I was afraid of the repercussions of the chakra meridians. I'll give it a try in the next few months.

So, what is my training? The only exception is the Sharingan. But that didn’t stop reading books. I was able to read and write when I was one and a half years old. This shocked my parents because they proved that I was a genius and that the rumors in the village were greatly exaggerated. Danzo was done with his tricks for a while, and the Uchiha clan had produced various village elders since then, when my parents introduced them to the possibility of a traitor at family meetings.

With many Uchihas and Sharingans missing recently or being found dead with their eyes gouged out, the old fogies of these families have become wary. The tribe demanded an answer from the Hokage, and as usual, he could only convince them with some despicable reason unknown to me.

I started deciding on my future plans as my journey in the ninja world was about to begin. First, I would awaken my chakras at the age of four. Then I will master firestyle: great fireball technique, I already know the gestures. Thanks to my father and my Sharingan, my father copied it while practicing in the backyard. This would graduate me from what is known as the Uchiha Ritual. I don't particularly like their customs, but I have to respect my parents' wishes. The most important thing is that I didn’t know how to practice Taishu until I was seven years old. My body and all my bones will have grown by the age of seven, and subsequent practice will not hinder my growth or have any negative impact on my body. So, until then, I'll be practicing mostly ninjutsu. As for the art of saints, that is something that is currently out of reach.

I activated the electromagnetic spectrum mode of the Sharingan and looked into the sky. Colors of various frequencies and wavelengths appeared in my field of vision, painted like a canvas. damn it! I can't recognize natural energy in all this nonsense. I have to figure out the colors and types of natural energy before I can master sage mode, so that's a distant future plan. I shook my head helplessly and started to focus on other things.

One of the best assumptions I've made concerns the use of kekkaigenkai. If I become proficient enough in the natural release required, and I can see the chakra type proportions in the kekkaigenkai, then I may be able to replicate that kekkaigenkai. This is my hypothesis now and I need to verify it somehow. But till now I haven't seen any chakra type kekkaigenkai users. The physical user of kekkaigenkai is all around me. Hinata's scary eyes still give me the creeps.

I closed my eyes and lay in my backyard, staring at Shisui.

"Brother...brother"

Shisui walked up to me and started tugging at my t-shirt, interrupting my thoughts. I closed the Sharingan as Shisui asked,

"What's wrong Shizui?"

Shisui threw the toy kunai at me and said in a cute voice:

"Brother and I will play Ninja Ninja together. You will be the enemy and I will be the brave ninja who defeats you."

"Shi Shui, why am I always the bad guy? Sometimes you become the bad guy and I become the good guy."

Shi Shui shook his head as he spoke.

"No, brother, you look more like a bad person to me."

I looked at my spiky hair and cool black outfit as I thought out loud.

"Shisui, why do you think I'm a bad person?"

Shisui held his little treasure under his chin, looking like he was seriously contemplating the profound aspects of life. After a while, he spoke,

"I have a gut feeling you're going to ruin a lot of people in the future."

"..."

Speechless, I was completely speechless by this sentence, and continued to be defeated by Shisui.