By the nature of the Uchiha clan, anyone who awakened the Mangekyō Sharingan would develop an extre mindset—becoming exceedingly arrogant, even delusional. This psychological shift manifested differently in each person.
Shisui Uchiha's reaction was: "Why can't you understand ? You're all too arrogant."
Itachi Uchiha thought: "The entire Uchiha clan is a bunch of fools."
Sasuke Uchiha: "This power is too great. I'm invincible now."
As for Madara Uchiha, his state of mind wasn't clearly described in the original manga, but in the ani, it resembled Sasuke's.
In short, after awakening the Mangekyō Sharingan, the Uchiha's emotions beca highly polarized. Soone like Sasuke—who simply beca inflated with ego—was already considered quite normal.
So, what happened when it was Uchiha Kei who awakened the Mangekyō?
Hm...
"It feels like... nothing's changed in terms of mindset? Sure, I'm definitely stronger now, and I feel like I'm invincible, but…"
The mont he thought about all the monsters still hidden in the shinobi world, and especially the existence of the Ōtsutsuki clan in outer space—those literal walking glitches—Uchiha Kei's inflated thoughts of invincibility evaporated.
Compared to those entities, he still felt far too weak.
To say nothing of Minato Namikaze—if they went all out in a death match, Kei was pretty sure he'd be the one to die.
There was just no helping it. The Yellow Flash's combat skills were simply too absurd.
Since transmigrating, Uchiha Kei's personal strength had never been in direct combat. Even though he had fantasized about becoming invincible—kicking Kaguya, punching Madara, and blowing away so Ōtsutsuki emperors—he had been grounded by battle after battle during his growth.
In terms of combat talent, Uchiha Kei had always been fairly average. Even after gaining nurous cheat abilities and dramatically improving his power, his performance in actual fights remained that of a steady, consistent perforr.
That's the high-EQ way of putting it.
The low-EQ version? He couldn't be like those combat-type cheat characters who constantly broke their limits mid-battle and grew stronger with each fight.
In other words—he couldn't beco a shōnen battle magnet.
The so-called "Uchiha King of Endurance" wasn't just a .
Of course, Kei was still very satisfied with how strong he had beco. After all, who doesn't like getting stronger?
Then, Uchiha Kei began to study the abilities of his newly awakened Mangekyō Sharingan.
As everyone knows, the Mangekyō Sharingan, being the evolved form of the Sharingan—the eye that reflects the heart—usually manifested emotionally resonant abilities upon awakening, based on the user's deepest desires.
And typically, the two eyes would awaken different abilities.
For example:
Itachi Uchiha had Amaterasu and Tsukuyomi
Sasuke Uchiha had Amaterasu and Kagutsuchi
Obito Uchiha had Kamui, but with different properties in each eye
Shisui Uchiha was a rare case—both eyes had the sa ability: Kotoamatsukami, making him a "rare variant."
Although Uchiha Kei awakened the Eternal Mangekyō, the way his abilities ford still followed the standard Mangekyō process—each eye developing a separate ability.
After so study, Kei's expression turned... subtle, even a little strange.
How to put it… the two abilities truly did match his personality and desires.
His left eye could see and anchor spiritual entities, allowing him to temporarily materialize spirits into the real world, so that living people could see the dead.
It felt... almost redundant with his system-granted skill Summon the Dead...
Honestly, his first reaction upon discovering this ability was: "Am I trash?"
He actually awakened this kind of power? Wasn't this totally useless?
He couldn't help but roast himself—why on earth would this be his Mangekyō ability? It almost made him break into laughter.
But on second thought, Kei began to understand.
What was his deepest desire at this point?
To complete system missions?
Sure, he had so motivation. But ever since learning he didn't need to worry about the main questline for a while, that desire had been suppressed and replaced by other goals.
His desires had beco nurous and complicated—he was basically a walking bundle of cravings.
Still, one stood out more than the rest:
As more and more "Heroic Spirits" filled his ntal network world, Kei couldn't help but think—it would be so great if these people could manifest in the real world.
Especially Sakumo Hatake. Ever since the fad White Fang of the Leaf pledged allegiance to him, the thought had only grown stronger. For soone like White Fang—a pure warrior—if he couldn't appear in the real world and show his value, then he'd just be stuck in the ntal network as an emotion-farming NPC.
That would be a trendous waste of Sakumo Hatake.
Golden Willpower could be produced by any strong soul. And in the future, as more Heroic Spirits were summoned, Sakumo might be reduced to background filler. That would be a terrible waste of his potential.
This realization had crystallized into a desire—which, in turn, manifested as Kei's left-eye Mangekyō ability.
Hm...
Felt even more useless now...
Wait a sec—if this power ca from Kei's regret over Sakumo's wasted talent, then maybe… could this be combined with his system skill Summon the Dead?
For example...
Summon Heroic Spirits from the ntal network world into reality?
After all, their current persistence as Heroic Spirits was already a miracle—a system glitch resulting from a synergy between Kei's system skill and the power of the Sharingan.
So—why not break the system again and summon them for real?
With this new idea in mind, Kei couldn't help but feel excited and full of anticipation. Without delay, he entered the ntal network world and headed to a Hatake estate specially prepared for Sakumo.
There, he found Sakumo and explained his new Eternal Mangekyō Sharingan, its left-eye ability, and the summoning experint he wanted to conduct.
"This experint should be theoretically safe, though there is a small chance of danger. If anything goes wrong, I'll imdiately send you back. But ultimately, the choice is yours."
"I'm not the type to force my subordinates into anything. So, Sakumo-senpai—the decision is in your hands."
Sakumo was silent for a mont. Then he didn't reply directly, but instead asked a question, his voice full of respectful solemnity like a samurai swearing loyalty to a lord:
"Lord Kei, you don't want the outside world to know about this 'illusion world' yet, do you?"
Kei raised his brows at the question, then nodded. "For now, yes—it'll remain secret."
Incidentally, now that Kei had awakened the Eternal Mangekyō, the population capacity of his ntal network world had increased dramatically.
Previously, it could only handle about 200 active spirits. Now, that number had ballooned to 5,000.
Technically, even awakening a standard Mangekyō would've capped out around 1,000, but Kei's eye was Eternal—so the capacity exploded.
With his current ntal bandwidth, he could even bring in all the Kage-level shinobi from every village across shinobi history and still manage just fine.
However, despite that capacity, the ntal network world wouldn't be opened to the public yet. He still had to work out the logistics and talk things over with his close companions.
Upon hearing Kei's answer, Sakumo responded with a serious look:
"Then please, Lord Kei—allow to participate in this experint."
Kei raised an eyebrow. After a mont of thought, he understood Sakumo's reasoning. "You want to see Kakashi, don't you?"
Sakumo nodded. His stern expression softened. "Yes, I want to see Kakashi. And I don't want to put you in a difficult position over the secrecy of this world. If the experint succeeds and I can manifest in the real world—then I'll go see Kakashi directly."
Kei gave a simple "Mm" in response and didn't say much else.
He didn't particularly mind if Kakashi knew about the ntal world, but keeping it secret was also a good thing. After all, Kakashi was still too young and wouldn't be able to resist mory-probing techniques.
Thus, the experint began.
And surprisingly—
Nothing went wrong.
It went off without a hitch.
The once-illusory Sakumo Hatake materialized before Uchiha Kei, his form illuminated by the five-pointed star pattern in Kei's left eye.
A real Heroic Spirit Summoning—completed successfully.
His appearance was exactly as it had been in the illusion world. And the summoning effect? Insanely cool. A five-pointed star magic circle had appeared in midair, glowing with a white aura—the whole thing looked just like a summoning ritual from fantasy.
Without question, based on visuals alone, Kei gave the summoning animation a perfect score. It completely satisfied his inner chūnibyō dreams.
This was way cooler than the Summoning Jutsu!
As expected of his own awakened Mangekyō—it matched his aesthetic perfectly!
With awe and excitent in his heart, Uchiha Kei looked at Sakumo and knew imdiately: the summoning had succeeded.
Sakumo, upon materializing, instinctively looked around. Noticing the enclosed room and advanced isolation barrier, he realized this must be Kei's room in the real world.
When Kei asked how he felt, Sakumo took a mont to examine his condition. He clenched his fists, sensing his strength. Then he closed his eyes to perceive deeper changes.
When he reopened them, his face held a trace of confusion.
Kei quickly asked what was wrong.
Sakumo found it difficult to explain. He didn't fully understand it himself, so he used his connection with Kei via the ntal network to share his vision.
This was one of the authorities granted by the network.
Through the lens of Kei's Mangekyō Sharingan, new elents appeared—ones that almost made Kei burst out laughing.
Because Kei could now see Sakumo's health bar, chakra bar, and attributes.
Yes—classic ga HUD elents.
A character's HP bar, chakra bar, stamina bar, and nurical stats for Strength, Speed, Ninjutsu, Taijutsu, and Spirit.
Even a final power rating: "Mid-Kage Tier."
What the hell—this suddenly looked like so fantasy RPG or ga interface.
No wonder Sakumo had looked so weird. Even soone like Kei, a well-traveled transmigrator, found this a little beyond expectation—let alone Sakumo himself.
All Kei could say was: as expected of his Mangekyō Sharingan—it truly integrated "gaming" into every aspect.
Still, this interface clearly displayed Sakumo's manifested strength.
Mid-Kage level—his original strength, neither weakened nor enhanced. Even though using such fantastical or gamified terms to quantify power felt a bit out of place, it was a direct, visual display. Follow current ɴᴏᴠᴇʟs on Nov3lFɪre.ɴet
And importantly, his power was stable, with no negative side effects. There was also no ti limit on how long he could remain summoned.
As long as Kei didn't manually deactivate his left eye ability, Sakumo could continue existing in the real world.
Of course, maintaining the summon consud chakra and eye power continuously. But with the Eternal Mangekyō, that wasn't a big deal—
Had it been just a regular Mangekyō, Kei might've gone blind after just a few uses.
Summoning required massive eye power—on par with Sasuke using Susanoo at full power with his regular Mangekyō.
It was a sight-to-blindness shortcut.
No doubt—this ability was insanely powerful.
But only in Kei's hands. He had too many other cheat skills and tools—it was the synergy that made this ability god-tier.
The left-eye Mangekyō's power on its own was just a soul-anchoring technique—summoning dead spirits to say a few words or reveal so truths. It had high cost and limited practicality.
Even if soone stole Kei's eyes, they wouldn't be able to do much with it—just summon ghosts.
That was the pessimistic view. But hey, in the original series, so Sharingan powers were plug-and-play, so Kei couldn't help but imagine worst-case scenarios.
Finally, Uchiha Kei gave his left-eye Mangekyō ability a na: "Heroic Spirit Manifestation."
Unlike the usual Uchiha tradition of naming abilities after Shintō deities, Kei went with sothing that fit his own mindset.
In fact, knowing his own personality, he had even considered giving it a more abstract or playful na—sothing like "Ride-Share Warrior," or "I Only Get By Thanks to My Senpai."
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