"Let's begin," Naruto said calmly.
He had spent a lot of effort and even risked exposing his identity just to get this Sharingan.
In Naruto's view, the main power "plugins" in the Hokage world were:
Sharingan, the Uchiha clan's Ashura–Indra chakra, the Uzumaki clan chakra, Tailed Beasts, and Sage Mode from the Summoning world.
Among these main plugins,
whether it was Ashura and Indra chakra, Uzumaki chakra, Jinchūriki power, or Sage Mode,
all of them were extremely difficult to obtain.
For example, Ashura chakra and the Uzumaki clan chakra required an extremely strong body and endurance.
Not to mention controlling a Tailed Beast or learning Sage Mode. Only a few people in the entire Shinobi world could do it. Even geniuses like Orochimaru failed to master Sage Mode in Ryūchi Cave.
Among all these powers, the Sharingan was the simplest and most direct one.
Just like a portable USB — plug it in and use it.
As long as you had enough chakra, you could use all of its power.
Of course, it had a weakness: it couldn't be turned off and would constantly consume chakra.
But for Naruto, that weakness didn't matter at all.
After all, he had three major advantages: the Uzumaki bloodline, Ashura chakra, and the Nine-Tails battery.
To him, chakra shortage simply didn't exist.
Although Naruto still didn't have the massive chakra he would gain in the future,
as his body continued to grow, by the age of twelve he would easily possess dozens of times more chakra than Kakashi.
Even if the Sharingan constantly consumed chakra, it would still be nothing to him.
More importantly, with the help of Yang chakra, Naruto didn't even need to worry about blindness. He could even risk using Mangekyō Sharingan like Obito's Kamui.
So in Naruto's opinion,
no one in the Shinobi world was more suitable to use the Sharingan than him.
Just look at Madara, who even transplanted Hashirama's cells into his body.
Compared to that, Naruto's situation was far simpler.
The only problem with Naruto using the Sharingan was that he couldn't deactivate it.
But even Shisui could walk around with his Sharingan always active.
So having only one Sharingan was nothing for Naruto.
That was why Naruto had been planning to obtain Shisui's Sharingan since the Night of the Nine-Tails.
Because this was the best shortcut for him to gain power far beyond the original timeline.
As for why he didn't wait for Sasuke's eyes, the reason was simple.
Sasuke's growth path was extremely complicated.
In the original timeline:
At age 7, Sasuke awakened One-Tomoe Sharingan during the Uchiha clan massacre.
At age 12, during the Land of Waves battle, his Sharingan evolved again during the fight with Haku, eventually reaching Two-Tomoe Sharingan.
Later, before the Chūnin Exams, it evolved further during his fight with Rock Lee.
At age 13, during the battle with Naruto at the Valley of the End, Sasuke awakened the Three-Tomoe Sharingan.
Then he trained under Orochimaru for three years, pushing his body to extreme limits, but his Sharingan still did not evolve.
It wasn't until age 16, after witnessing Itachi's death and learning the truth about him, that Sasuke awakened the Mangekyō Sharingan out of grief and anger.
After that, he transplanted Itachi's eyes and finally awakened the Eternal Mangekyō Sharingan at age 17.
In other words,
if Naruto waited for Sasuke's eyes, it would take at least ten years.
By that time, the Fourth Great Ninja War would already be happening.
There would be no time left to slowly evolve the Mangekyō into the Rinnegan.
Even Uchiha Madara needed decades to evolve from Mangekyō to Rinnegan.
Following that path would simply be too slow.
So Naruto decided on another plan.
First, obtain Shisui's Sharingan early.
Adapt to it in advance and push his body closer to the requirements for Rinnegan evolution.
Then later stimulate Sasuke to awaken Mangekyō Sharingan earlier and take his eyes afterward.
Although Shisui's Yin chakra purity wasn't enough to evolve into Rinnegan,
his Mangekyō Sharingan was still extremely powerful.
With just one eye, Shisui could even use Susanoo.
Combined with Naruto's Yang chakra, the power would still be terrifying.
And Shisui's Sharingan also had extremely powerful genjutsu abilities.
It was enough to avoid the surveillance of the Anbu outside.
The only unfortunate thing was that Naruto obtained Shisui's right eye.
Not the left eye with the legendary Kotoamatsukami that had a 10-year cooldown.
Otherwise Naruto could simply control Hiruzen Sarutobi and make him his puppet.
The right eye also possessed a form of Kotoamatsukami, but its control effect was temporary.
Once the chakra disappeared, the illusion would break.
It was far weaker than the left eye.
Even Ao's Byakugan once noticed abnormalities in that genjutsu.
Still, the right eye possessed an extremely powerful offensive genjutsu called Kotoamatsukami: Light.
According to the official game Naruto Ultimate Ninja Storm, it was said that no illusion could compete with it.
Fortunately, what Naruto truly needed from the Sharingan was something else.
Its perception and learning ability.
Because Naruto still carried memories from his previous life, and some subconscious habits were difficult to change.
The Sharingan could strengthen memory, analyze movements, and copy techniques.
It could copy taijutsu, ninjutsu, and even create muscle memory.
With the Sharingan,
Naruto would never worry about learning ninjutsu again.
In a short time, he could become a ninja genius comparable to Itachi.
Naruto looked at the Sharingan in his hand and took a deep breath.
Then he spoke silently in his mind.
"Kurama… let's begin."
In the next second,
red chakra from the Nine-Tails quickly covered Naruto's empty right eye.
The wound that had already healed was torn open again, revealing fresh flesh.
Naruto quickly pushed the Sharingan directly into his eye socket.
With the help of Kurama's chakra, the nerves in Naruto's eye began rapidly connecting with the Sharingan.
Just like Madara's famous "USB transplant method."
The Sharingan was successfully connected.