The might of the 'Susanoo Tomoshibi' was fully displayed at this moment.
Without the 'Susanoo Tomoshibi', Shinji would have had no choice but to perform surgery to implant the dojutsu for Mumei. In that case, whether the fusion would succeed would only be revealed after awaiting the final outcome.
However, with the 'Susanoo Tomoshibi', the fusion's success could be sensed by the recipient themselves.
At the same time.
The 'Susanoo Tomoshibi' held another immense advantage: its fusion speed far surpassed traditional surgical implantation.
With surgical implantation, results could take anywhere from two weeks to several months.
But the fusion of the 'Susanoo Tomoshibi' took effect almost instantly, requiring at most a few days of adjustment afterward!
Seeing Mumei brimming with confidence, Shinji nodded slightly and slowly stepped to the side.
Maintaining both 'Susanoo' and 'Susanoo Tomoshibi', Mumei sat cross-legged and closed her eyes once more.
"Fusion!"
Moments later, with a soft shout from Mumei, the fusion officially began.
In an instant, the two pairs of eye sockets on the cheeks of her 'Susanoo' radiated a bewitching crimson light. Then, the two clusters of red light began to merge, causing the entire face of the 'Susanoo' to glow with a viscous, blood-like brilliance.
Shinji narrowed his eyes slightly.
Mumei's fusion progress was even faster than he had anticipated, which made him wonder if Mumei shared some blood relation with Uchiha Fugaku.
After all, being part of the same clan, having some distant kinship wasn't surprising.
Roar!
Suddenly, Mumei's 'Susanoo' let out a furious roar!
The roar snapped Shinji's wandering thoughts back to reality. He noticed that the two pairs of eye sockets on the cheeks of Mumei's 'Susanoo' had fused into one, and the crimson light they emitted was gradually solidifying.
"It's a success!"
Shinji clenched his fist.
Mumei's success meant his investment hadn't gone to waste. More importantly, it meant his 'backup plan' could proceed.
After a long while, Mumei finally opened her eyes, meeting Shinji's gaze. "Shinji, I think I did it!"
Shinji nodded. "Indeed, congratulations!"
Mumei dispelled her 'Susanoo' and 'Susanoo Tomoshibi', then gently touched her eye sockets. "Is this the feeling you mentioned before, the Eternal Mangekyo Sharingan? My dojutsu power has increased so much, and it feels like it's still growing!"
Shinji was captivated by the pair of Eternal Mangekyo Sharingan in Mumei's eye sockets, shimmering with an otherworldly glow.
Like the Rinnegan, the Sharingan also possessed the ability to observe chakra flow. So, just by visual inspection, Shinji could sense the immense power of Mumei's dojutsu at this moment.
Before this, he had believed that his own Eternal Mangekyo Sharingan was the pinnacle of the Uchiha clan's potential, unmatched in dojutsu power.
But now, witnessing Mumei, he realized there was always someone stronger!
"How is this possible?"
Shinji's face showed confusion.
He knew Mumei's dojutsu power would be formidable after fusing the Eternal Mangekyo Sharingan, but he hadn't expected it to reach such heights.
Calming his emotions, he began to analyze.
In his view, the reason Mumei's dojutsu power was so overwhelming was primarily due to the domineering dojutsu 'Yachihoko'.
Additionally, he analyzed that the 'Amaterasu' and 'Tsukuyomi', implanted into Mumei's body by the Uchiha clan through techniques, were also contributing to her current surge in dojutsu power.
When Mumei still possessed the Mangekyo Sharingan, her 'Yachihoko', though powerful, was on the same level as the implanted 'Amaterasu' and 'Tsukuyomi', so she couldn't consume them.
But now, with the fusion of the Eternal Mangekyo Sharingan, her 'Yachihoko' had instantly ascended to the level of the Eternal Mangekyo, allowing it to fully suppress and absorb 'Amaterasu' and 'Tsukuyomi'.
Thus.
Mumei's claim that her dojutsu power was still increasing was likely because her 'Yachihoko' was absorbing the 'Amaterasu' and 'Tsukuyomi' implanted in her body.
To confirm this, Shinji asked, "What is your dojutsu now?"
Mumei sensed for a moment and replied, "It still seems to be 'Yachihoko'!"
Shinji asked, "What about the 'Amaterasu' and 'Izanami no Mikoto' from those Mangekyo?"
Mumei shook her head. "'Izanami no Mikoto' seems to have vanished, but I can still use 'Amaterasu'!"
Shinji fell into thought at her words.
In theory, an Eternal Mangekyo Sharingan fused with the 'Susanoo Tomoshibi' should retain the dojutsu of both Mangekyo.
Shinji himself had successfully retained 'Susanoo Tomoshibi', as well as his grandmother's Mangekyo dojutsu, 'Jikibi' and 'Wazunagi'.
Mumei's failure to retain 'Izanami no Mikoto' suggested that the power of the 'Susanoo Tomoshibi' activated by Mumei's crystal was slightly lacking.
In fact, Shinji suspected that it wasn't just 'Izanami no Mikoto' that was lost—Uchiha Fugaku's Mangekyo 'Amaterasu' might have been lost as well.
However, since the Uchiha clan had implanted 'Amaterasu' and 'Tsukuyomi' into Mumei's body through techniques, she could still use 'Amaterasu'.
Knowing Mumei needed time to adjust to her body's changes, Shinji refrained from further questions. He quietly left the training ground, giving Mumei space to process.
Back in the laboratory, Shinji began documenting the process of Mumei's fusion of the Eternal Mangekyo Sharingan, filling in all the details.
After a long while, he put down his pen.
Flipping through the thick notebook, a faint sense of pride welled up in his heart. Who would have thought that he, a remnant of the Uchiha clan teetering on the edge of survival, would successfully fuse three pairs of Eternal Mangekyo Sharingan in just a few years, with two of them even awakening the Rinnegan?
If Black Zetsu, obsessed with reviving Kaguya Otsutsuki, or Isshiki Otsutsuki, who had been lurking in the shinobi world for a millennium seeking a vessel, learned of this, their jaws would likely drop!
But this was only the beginning.
Now that Mumei had successfully fused the Eternal Mangekyo Sharingan, with dojutsu power surpassing even Shinji's when he was on the verge of awakening the Rinnegan, his 'backup plan' could continue. That was what truly excited him!
A few hours later, Mumei arrived at the laboratory.
Her eye sockets still held that striking pair of Eternal Mangekyo Sharingan. Perhaps because the pattern of her Eternal Mangekyo was relatively simple, it exuded an even more divine aura, as if it could captivate the soul!
Before Shinji could speak, Mumei smiled and said, "Shinji, I can now fully return 'Susanoo Tomoshibi', 'Jikibi', and 'Wazunagi' to you!"