Mumei was, naturally, deeply puzzled.
Despite possessing Yachihoko, in her mind, the dojutsu power of a Mangekyo Sharingan was still an incredibly precious treasure that needed to be cherished.
Thus, she couldn't understand why Shinji wanted her to completely exhaust the dojutsu power of the Mangekyo Sharingan wielded by Susanoo Tomoshibi, emphasizing that it must be depleted to its absolute limit.
Shinji didn't explain further, merely nodding at Mumei.
Though her heart was filled with questions, out of trust in Shinji, Mumei followed his instructions and began draining the dojutsu power from Uchiha Fugaku's pair of Mangekyo Sharingan.
Whoosh
In an instant, a massive wave of chilling energy erupted from Mumei's body!
Depleting dojutsu power might seem simple, but it was no easy task.
Take Sasuke, for example. Despite his recklessness and lack of care for his dojutsu power, the intense pain caused by overexertion would force the Sharingan to revert from its Mangekyo state. Even now, he had never fully exhausted his Mangekyo Sharingan's dojutsu power.
Without special means, completely ruining a pair of Mangekyo Sharingan would take considerable time.
But Mumei was different. With Yachihoko, draining a pair of Mangekyo Sharingan's dojutsu power required only a mere thought.
The chilling energy emanating from Mumei continued to surge, giving off an unapproachable aura!
Others might instinctively fear Mumei, but Shinji knew this was merely the result of her unleashing Yin Release chakra.
Soon, the chilling aura around Mumei gradually subsided.
At that moment, she said to Shinji, "Shinji, I've transferred all the dojutsu power from that pair of Mangekyo Sharingan into my own."
Shinji shook his head. "It's not enough!"
"Not enough?" Mumei grew even more confused, saying, "If I continue, that pair of Mangekyo Sharingan might be completely ruined!"
Then she froze, realizing something. "You're intentionally making me destroy it with Yachihoko?"
Shinji nodded. "Only by pushing it into a half-damaged state can we minimize the mental imprint left by its previous owner."
"I understand."
As a Mangekyo Uchiha herself, Mumei grasped Shinji's intent without needing further explanation.
Activating Yachihoko again, she squeezed out the remaining dojutsu power from Uchiha Fugaku's already-depleted Mangekyo Sharingan.
Hiss
A sharp pain followed, causing Mumei to wince slightly.
But having been trained as a weapon since childhood, she was accustomed to all kinds of pain. Moreover, since this wasn't a surgical transplant but rather wielded through the dojutsu Susanoo Tomoshibi, the pain was milder than it would have been otherwise.
Roar
At that moment, Mumei's Susanoo suddenly projected from her body, letting out a pained roar.
Accompanying the roar, the red glow in the second pair of eye sockets on her Susanoo's face flickered briefly before rapidly dimming, as if the sockets were empty.
Mumei staggered a few steps and collapsed to the ground.
Huff huff
Clutching her forehead, Mumei panted heavily.
Shinji observed the second pair of eye sockets on Mumei's Susanoo, confirming that the scarlet glow representing Uchiha Fugaku's Mangekyo Sharingan had completely faded, and let out a breath of relief.
After recovering for a moment, Mumei said to Shinji, "Shinji, I can no longer sense that pair of Mangekyo Sharingan. It… it seems to have been completely destroyed by my Yachihoko."
Even knowing this was Shinji's intention, Mumei still looked like a child who had done something wrong, her gaze flickering nervously.
Shinji said calmly, "Release the wielding."
Hearing this, Mumei immediately activated Susanoo Tomoshibi and removed Uchiha Fugaku's now-exhausted Mangekyo Sharingan.
At this point, the Mangekyo Sharingan was neither the scarlet of its active state nor the inky black of its dormant state, but a pale gray with whitened pupils.
Shinji furrowed his brow slightly.
In truth, this level of damage wasn't quite half-damaged—at least not compared to the two pairs of Mangekyo Sharingan Karin had previously restored. The degree of destruction was insufficient.
However, considering Mumei possessed Yachihoko and could use his Susanoo Tomoshibi through the gemstone, this level of damage should barely suffice.
Seeing Shinji's furrowed brow, Mumei cautiously asked, "Shinji, did I not get the balance right? Don't worry, I can use Yachihoko to restore its dojutsu power. It might just take some time!"
Shinji smiled, dispelling Mumei's concerns. "No, I'm saying you didn't destroy it enough."
"It's still not enough?!"
Mumei's face was full of shock.
To think that a pair of Mangekyo Sharingan damaged to this extent would still require her Yachihoko an unknown amount of time to fully restore its dojutsu power.
Shinji said, "I've restored Mangekyo Sharingan with decaying cellular tissue before, so don't worry!"
With that reassurance, Mumei felt more at ease. "What do we do next?"
Shinji pondered for a moment before saying, "First, use Yachihoko to reinfuse Jikibi and Wazunagi into my Rinnegan."
Indeed.
The Jikibi, Wazunagi, and Susanoo Tomoshibi that Mumei had previously infused into Shinji's Rinnegan using Yachihoko had vanished when Shinji exhausted his dojutsu power, along with the Magatama on his Rinnegan. She needed to reinfuse them for him to use them again.
Having just absorbed all the dojutsu power from Uchiha Fugaku's Mangekyo Sharingan, Mumei's dojutsu power was abundant. She promptly followed Shinji's instructions and reinfused Jikibi and Wazunagi into him.
After completing this step, Shinji led Mumei back to the laboratory and instructed her to lie on the operating table.
As he prepared the instruments, he said softly, "The next steps are as follows: I'll surgically remove your Mangekyo Sharingan, then implant the damaged pair of Mangekyo Sharingan into your eye sockets. After that, we'll use your body to nurture the damaged pair, bringing it 'back from the dead'!"
Hearing that her Sharingan would be removed, a flicker of unease passed through Mumei's eyes. But out of trust in Shinji, she quickly suppressed it, nodding to indicate she was ready.
Shinji didn't belabor reassurances or make promises. He simply nodded back and began the surgery.
Having performed eye transplants countless times, it took him less than a minute to safely remove Mumei's Mangekyo Sharingan, which contained Yachihoko, and implant Uchiha Fugaku's Mangekyo Sharingan into her eye sockets.