Although the current Indra Bloodline {Fragment} carries the word "fragment," it still meant that Uchiha Hikaru already possessed the ability to awaken the Mangekyō Sharingan without any side effects.
It was simply a matter of spending some time leveling up one more tier to remove that "fragment."
Judging by the system's current Idle Training System capability, even orange-grade skills could reach Sage of Six Paths level. At this rate, Uchiha Hikaru would become a god just by idling.
So even if he hadn't reached the system's upper limit, there was already no opponent for him on the Ninja Continent.
This discovery made Uchiha Hikaru elated for quite a while, until his attention was drawn to another system notification.
"Combat Power is for reference only"—that part was easy to understand. Two people with identical abilities—one experienced in combat, the other not—if they were to fight to the death, the survivor would surely be the one with actual combat experience.
It's just like when an ordinary person runs into a criminal. Their first reaction definitely wouldn't be, I can fight back. Being able to remain calm and escape immediately is already beyond average.
Take Kaguya Ōtsutsuki for example, the origin of chakra and the Ten-Tails' jinchūriki.
Even someone as powerful as her was caught off guard by Naruto and Sasuke, who used Chibaku Tensei to seal her once again.
So combat experience played a key role in battles between individuals of the same tier—it could even help one defeat stronger opponents while at a disadvantage.
The system's message carried another implication, one that was subtle, but Uchiha Hikaru still picked up on it.
"Combat Power is only for reference"—this suggested that his current mindset had gone astray.
Even with a Sage-level physique and a combat power in the thousands or tens of thousands, did that really mean Uchiha Hikaru was strong?
Sure, having solid foundational abilities was a good thing. But how could one fend off enemies or protect themselves with just that?
Your combat power was just a baseline. Without the right techniques, relying on brute strength alone wouldn't be enough to compete against others of the same realm.
This made Uchiha Hikaru decide it was time to improve his actual combat techniques.
Since he carried the Uchiha bloodline, the first thing that came to mind was fire.
So, he placed Fireball Jutsu in the newly unlocked idle training slot.
Besides, the Sharingan alone was ridiculously lopsided. Even if you unlocked the Mangekyō, without any supporting abilities, it'd still be inconvenient.
Otherwise, what? You gonna activate Susanoo every time you run into a Genin? Sure, it might look cool, but honestly—it's overkill.
Across the myriad realms, there were countless who specialized in fire. It might sound basic, but its potential was incredibly vast.
The most convincing example would be Yan Emperor Xiao Yan's Heavenly Flames. The most embarrassing? That'd be Ace from One Piece.
So fire, despite being mainstream, could truly be overwhelming when used well.
Most importantly—it looked awesome.
Being strong is temporary. But being cool? That's forever.
Uchiha Hikaru wanted it all!
Just as he was looking at the Two-Tomoe Sharingan (Green) in the system, he felt his eyes activate on their own.
Then, without any warning, a third tomoe formed.
Looking at the system tag that now read Three-Tomoe Sharingan (Green) – Lv.10, Uchiha Hikaru quietly gave the system a thumbs up.
With the system updates handled, Uchiha Hikaru began inspecting his surroundings.
He had been abruptly woken up by the power-up—it was the system's first ability upgrade, and he hadn't expected such a commotion.
The newly enhanced ability had caused a sudden spike in his chakra, and he couldn't control the sudden surge. In the end, it even collapsed his bed.
Uchiha Hikaru scratched his head in frustration. Great, I wrecked my own bed. Where am I supposed to sleep now...?
Then he remembered—Mito Uzumaki was going to officially adopt him tomorrow. This bed could last one more night. He decided not to worry about it anymore.
Just then, as if sensing something, Uchiha Hikaru suddenly leapt off the bed.
His unstable chakra flared wildly in sync with his will, bursting out with a powerful pressure.
Uchiha Hikaru's eyes locked onto the window as he shouted:
"Who's there!?"
The next moment, Uchiha Noboru stepped out from beside the window, forcing a wry smile.
"Misunderstanding. I came by today to check if you needed anything from me."
"I felt a huge wave of chakra while on my way, and thought something might've happened to you—so I stopped by the window to investigate first."
"I didn't expect to scare you. That's my bad."
But Uchiha Hikaru didn't lower his guard because of Uchiha Noboru's words. Instead, he became even more cautious.
"Then, did I ask you for anything yesterday?"
You always had to be wary of the Transformation Technique. As for using the Sharingan to verify—Uchiha Hikaru didn't even consider it.
If Uchiha Noboru was the real deal, then the Sharingan thing would become a problem.
Uchiha Hikaru didn't even want to imagine what might happen if the clan's stubborn elders found out that he, at six years old, had awakened the Three-Tomoe Sharingan.
"Yesterday, you asked me for a bunch of medical books. It was just the two of us there. That should be enough proof I didn't use a Transformation Technique, right?"
Hearing that, Uchiha Hikaru finally let his guard down a little, though he still looked at Uchiha Noboru with some suspicion.
Seeing his reaction, Uchiha Noboru could only smile bitterly, fully aware that what he'd done was questionable.
Even if he had good intentions—worried about Uchiha Hikaru's well-being—spying on someone's room without permission wasn't exactly excusable.
Thinking back to Uchiha Hikaru's behavior yesterday, he paused for a moment and said:
"I wasn't here today, alright? I'll send you some Fire Style jutsu later—just take it as my apology."
But times had changed. Yesterday, he couldn't care less. Today? Uchiha Hikaru was out of reach.
Though it sounded like a joke, Uchiha Hikaru truly no longer needed any of that minor stuff.
Being adopted by Mito Uzumaki meant that most of the Senju Clan's secret resources would now be available to him.
Why chase scraps when you could study the techniques of Tobirama Senju himself?
So Uchiha Noboru's apology gift? Uchiha Hikaru had no use for it anymore.
Still, he had a decent impression of Uchiha Noboru—this guy might be useful in the future.
In fact, Uchiha Noboru had shown signs of a mindset different from typical Uchihas yesterday, which in itself was a mark of someone with potential to awaken the Mangekyō Sharingan.