Upon entering the Kamui Dimension, Shinji conducted various tests.
First, he found that his Jikibi connection to the outside world was severed by the Kamui Dimension, indicating that Jikibi couldn't bridge across different spaces.
As he had anticipated, however, the connection to his Red Dragon remained intact.
This confirmed one of his theories: the sensory link of a space-time dojutsu could span different dimensions. As for the limits of this connection, he currently had no way to test it.
"The connection to my blood clone is weakening," Shinji suddenly chuckled, musing, Could it be that Obito is fleeing toward the Akatsuki's hideout?
The thought of Obito hurriedly escaping to the Akatsuki's lair made Shinji laugh.
But he quickly suppressed his amusement. After all, he hadn't risked entering this place just to have a laugh.
Sitting cross-legged, Shinji began to carefully recall the strange sensation of having his body warped by Obito's Kamui.
The shock in his eyes under the mask hadn't been entirely feigned.
Though Karin's prior warning had prepared him, the moment his body was caught by Kamui, rendering him nearly immobile, he felt a long-forgotten sense of powerlessness.
In that instant, he had almost instinctively wanted to unleash Almighty Push.
"The ocular power of the Mangekyo Sharingan is practically omnipotent, capable of tearing and twisting space itself!" Shinji marveled inwardly before continuing his thoughts. If only I could experience it a few more times!
That brief encounter, being his first, was clouded by shock, surprise, and panic, and the duration was too short for him to glean much useful insight.
The more he thought about it, the more frustrated Shinji became. Why could Sasuke comprehend Amenotejikara so quickly?
Sasuke, having mastered Amenotejikara, had essentially gained the ability to breach space. Later, he explored various alternate dimensions using his Rinnegan.
Shinji's Rinnegan, however, had yet to awaken a similar space-time dojutsu, leaving him temporarily unable to breach space with it.
Could it be because he only had one Rinnegan?
Shinji gave a self-deprecating chuckle.
But after laughing, his expression turned serious as he pondered.
Though it was just a casual quip, he felt there might be some truth to it. A single Rinnegan was clearly easier to control than a pair.
In the original timeline, after reclaiming Nagato's pair of Rinnegan, Obito only transplanted one into himself.
This was partly because his Mangekyo Sharingan with Kamui was already exceptionally powerful, but also because his body at the time couldn't handle the strain of two Rinnegan.
In contrast, Shinji's Rinnegan had grown stronger for various reasons since its awakening.
Now, it had evolved into the rare Six-Tomoe Rinnegan, a rarity in the shinobi world.
In terms of ocular power, his Six-Tomoe Rinnegan far surpassed an ordinary Rinnegan.
The stronger the ocular power, the harder it was to control.
Faced with such an immense and sudden surge of power, even its original wielder would likely need time to fully master it.
If this hypothesis is correct, it means I've been blindly chasing the enhancement of my ocular power while neglecting control training—a huge mistake!
Shinji's brows furrowed.
In his view, if his control couldn't keep up with the growth of his ocular power, it would be like someone used to riding a bicycle suddenly switching to a high-powered motorcycle.
If they rode slowly, carefully getting a feel for it, things might be fine. But flooring the throttle without being familiar with it would inevitably lead to a crash!
Realizing this, Shinji felt a chill, a lingering sense of dread.
He was like someone accustomed to a bicycle suddenly driving a car—no, a sedan.
The short span of a month wasn't nearly enough for him to adapt to and master the Six-Tomoe Rinnegan.
Fortunately, he hadn't been reckless during this time, nor had he overused his Six-Tomoe Rinnegan. Even when creating Takamagahara, he only handled the Jikibi part, relying on Mumei's Tsukuyomi and Yachihoko for the rest.
Otherwise, he could have faced serious trouble!
You can't eat a whole meal in one bite. With some time before the great war, I can't slack off on my training…
Shinji came to a realization.
If he couldn't fully control his Six-Tomoe Rinnegan now, how could he hope to wield the Ten-Tails and sustain Infinite Tsukuyomi with ease in the future?
Thus, while the Ten-Tails Jinchuriki plan and Infinite Tsukuyomi plan couldn't be neglected, his personal training was equally critical.
He even thought of Uchiha Madara in the original timeline, who became the Ten-Tails Jinchuriki.
Black Zetsu's ability to land a fatal blow on the shinobi world's strongest at the time wasn't just due to its own methods. It likely also stemmed from Madara having only recently become the Ten-Tails Jinchuriki, not yet fully adapted to or in control of his power.
With this clarity, Shinji lost interest in staying in the Kamui Dimension.
He stood, glancing around, and murmured, "Too bad. Obito will surely inspect this place thoroughly later. Anything I leave behind likely won't escape his notice!"
Obito was undoubtedly more familiar with the Kamui Dimension than he was. Any traps or setups Shinji left would likely be discovered, so it wasn't worth the effort. Better to leave sooner.
Besides, he had no intention of killing Obito now. Doing so might slow the Akatsuki's progress in reviving the Ten-Tails, which he didn't want.
With a thought, Shinji shed the Akatsuki's hooded red-cloud cloak and activated Red Dragon.
Whoosh.
In an instant, Shinji's true body appeared in the second-floor private room of the barbecue restaurant in the village.
Anticipating a possible swap, the blood clone left in the room had deliberately closed half the window and stayed in a blind spot.
Thus, aside from Mumei, no one noticed Shinji's return to the room.
Removing his cat-face mask, Shinji used Jikibi to contact Haku and Karin, who had been tracking Obito, calling them back.
Mumei asked, "Everything go smoothly?"
Shinji hadn't shared the details of today's plan with her, and she hadn't pressed. Seeing his furrowed brow, she grew concerned.
Shinji smiled. "Fairly smooth. At least it helped me figure some things out!"