Not long after—
Inside the Great Spiritual Library Corridor, system prompts echoed endlessly in Bai Chen's mind:
"Beginning official sign-in!"
"Sign-in duration: 5 seconds."
Standing in this ancient, sealed space, Bai Chen suppressed his excitement and calmly waited for the countdown to end.
Very quickly, his wish was granted.
"Congratulations, Host. Sign-in successful!"
"Reward obtained: Three-Tomoe Sharingan (Master Genjutsu)!"
In that instant—
the moment the notification sounded—
Bai Chen felt a clear change surge through his body.
In less than a few seconds, an indescribably powerful ocular force burst from the depths of his pupils—fierce, overflowing, and vast.
And along with that power—
three rotating black tomoe, glowing with an eerie red light, manifested around his irises.
His vision became brighter than it had ever been.
Sharper.
Clearer.
And when he casually shifted his gaze to scan the surroundings, he suddenly realized something that made his heart explode with joy—
"…Is this…?"
"After being pierced by ocular power—has the 'essence' been exposed…"
"and turned into a kind of illusory, simulated projection?"
Bai Chen widened his eyes, his expression uncontrollably ecstatic.
Across different zones of the Great Spiritual Library Corridor…
countless books had been neatly stacked and arranged in endless rows—formed by rule-based power, recorded by the Corridor itself.
But once Bai Chen's Three-Tomoe Sharingan swept over them—
all the text, information, and hidden records inside those volumes…
directly projected outward like light and shadow, forming vivid, lifelike virtual images of varying sizes.
It was as if an invisible hand had flipped open every book for him.
Bai Chen didn't need to walk to a designated shelf.
He didn't need to physically open anything.
He only had to stand still, look—
and in a single instant…
the Sharingan's "copy" function would capture it all, perfectly, without missing a single line.
"Just as I expected…"
"After the system's localization upgrade…"
"and with spiritual power as fuel…"
"my Three-Tomoe Sharingan is far stronger than the original version…"
"It's actually ignoring the rule power here…"
Bai Chen stared at the vast space, where one after another glowing "screens" appeared only because of his eyes.
His mood—long absent—finally surged into pure excitement again.
He no longer needed to wander around.
All he had to do was focus—
select the useful projections—
and copy them into himself.
With this, Bai Chen could read Soul Society's entire history without lifting a finger.
At that moment—
the moment his ocular power exploded—
the two guiding him in front, Kyōraku Shunsui and Sasakibe Chōjirō, faintly sensed something unusual.
"Hm?"
"Is it just my imagination?"
"I feel like the surroundings… changed for a split second."
Kyōraku stopped abruptly, frowning as he carefully scanned the bookshelves.
But after looking around, he found nothing visibly wrong.
"It's probably just you being overly sensitive."
Sasakibe's calm voice came from behind.
"That's normal."
"This is the Great Spiritual Library Corridor—legendary forbidden ground."
"Even for me… after living over two thousand years, I've entered this place only a handful of times."
"And since it's your first time here, it's only natural you'd feel tense."
In truth, without his special status—Yamamoto's closest aide and only vice-captain—Sasakibe wouldn't have qualified either.
It had been nearly a thousand years since his last visit.
Back then, after the war triggered by Yhwach…
Yamamoto personally brought him here to investigate that man's past.
"Maybe my eyes played tricks on me."
Kyōraku shrugged, then turned back and glanced at Bai Chen with a bright smile.
"Bai Chen… how is it?"
"Since it's your first time inside too…"
"you should be nervous… at least a little, right?"
But as Kyōraku smiled and looked straight at Bai Chen—
he didn't detect anything strange.
All he saw were Bai Chen's ordinary black pupils.
The rotating tomoe… were completely hidden, as if they'd been forcibly masked from perception.
"So as long as I inject spiritual power…"
"I can actively conceal the Three-Tomoe Sharingan…"
"The system is seriously clutch…"
Bai Chen maintained a calm gaze and met Kyōraku's eyes.
But inside, he was cheering like crazy.
Another unexpected bonus.
Even while "eyes open,"
with a single thought he could cast a self-contained disguise—
masking the tomoe outwardly while keeping the Sharingan's functions running in the dark.
The only difference was that without visible tomoe, his ocular power output dropped slightly—
meaning genjutsu wouldn't fire instantly.
Bai Chen didn't care.
Even with genjutsu temporarily offline—
perception, analysis, and copying still worked.
He could talk face-to-face with Kyōraku…
while secretly copying everything in the Library Corridor nonstop.
"Nervous? Not really."
Bai Chen shook his head and smiled faintly.
"I'm more excited than anything."
"Like Vice-Captain Sasakibe said…"
"not everyone gets permission to enter the Great Spiritual Library Corridor."
"This is my honor."
He couldn't wait.
He wanted to copy—at the fastest speed possible—
every ancient forbidden technique…
and all records related to the Soul King Palace and Squad Zero—
in one sweep, forever.
"Heh…"
"Bai Chen—go ahead."
"Read whatever you want."
"As long as it's within the zones that were approved…"
"We won't disturb you."
Sasakibe nodded gently, signaling that Bai Chen could act freely now.
He and Kyōraku were only here to "accompany," not interfere.
They would remain by the entrance.
"Then I'll trouble you both to wait."
With the formalities done, Bai Chen stopped wasting time and moved toward the upper levels of the Corridor.
As he passed Kyōraku and Sasakibe—
Bai Chen quietly released the concealment.
The three rotating tomoe reappeared in his eyes.
And from that moment on—
his gaze swept, copied, recorded—
without restraint.
Hours Later
Time flew.
In the blink of an eye, most of the day had passed.
"Interesting…"
"The Great Spiritual Library Corridor really deserves its title as Seireitei's oldest forbidden ground."
"It truly records everything that ever happened…"
Standing on a lower level, Bai Chen spoke with genuine awe.
Over the last few hours, using the Sharingan's special nature, he patiently scanned shelf after shelf.
And in that process—
he saw scenes from two thousand years ago, when Yamamoto wasn't yet a frail old man but a powerful, prime-aged commander.
Through the projected records, Bai Chen watched—
from start to finish—
multiple battles between Yamamoto and the young Sasakibe…
and he finally understood just how terrifying Gonryōmaru's Bankai truly was—far beyond how it appeared later after being stripped by the Quincy.
He also witnessed other famous events:
In the Zaraki District a thousand years ago—when Unohana Retsu was still the "First Kenpachi"—her encounter and battle with the boy who would become Zaraki Kenpachi.
The ancient Thousand-Year Blood War, when the pure-blood Quincy hadn't yet evolved "Blut," and fell one after another under the slaughter of the original captains—until only Yhwach remained, facing Yamamoto's Bankai and the first generation of captains… and finally being cleaved down by a supreme flame blade.
None of these "ancient projections" directly boosted Bai Chen's raw strength—
but by observing from a god's-eye view…
he absorbed priceless battle sense.
In just a few hours, Bai Chen's combat experience grew explosively.
He learned refined timing.
Sharper judgment.
Cleaner control.
Of course—he didn't forget the main purpose.
He came for forbidden arts.
He came for what only Ichibē Hyōsube was said to possess:
the mysterious Secret Kidō of the ancient era.
With the Three-Tomoe Sharingan's copying ability—
Bai Chen needed only minutes.
Space-time Kidō.
Secret Kidō.
Thousand-Mile Heaven-Piercing Palm.
One after another—
ancient forbidden techniques were copied, engraved, and mastered.
This meant—
not only did Bai Chen's battle experience rise dramatically…
his Kidō attainment also surged into something close to true "Kidō mastery."
This trip to the Great Spiritual Library Corridor…
was a complete jackpot.
Ocular power unlocked.
Genjutsu acquired.
Three-Tomoe awakened.
And beyond that—
he gained legendary combat experience—
and the most crucial upgrade of all:
his Kidō strength skyrocketed to the point where it was practically maxed out.
At this moment—
Bai Chen had become what he was always meant to be:
a true, flawless six-sided warrior.
◇ I'll drop one bonus chapter for every 10 reviews (leave a review/comment!)
◇ One bonus chapter will be released for every 100 Power Stones.
◇ Read 60 chapters ahead on P@treon: patreon.com/KageNaruto