After observing the pair of Eternal Mangekyou Sharing Karin's eyesockets, Kuroto couldn't help but mutter with a frown, "This is a bit strange."
Karin got worried by Kuroto's frown, and asked, "Kuroto-sama, what's the matter? Is something wrong with these eyes?"
Kuroto was too busy thinking that he didn't answer Karin.
Since Karin can feel the living characteristics of the pair of Eternal Mangekyou Sharingan so early, it can only mean that the pair of eyes has recovered the visual prowess. However, this is quite strange in his opinion because the time it took for the pair of eyes to recover the visual prowess is less than his prediction.
Before he took these eyes from Danzo, these pair of eyes were only a step away from evolving into the Rinnegan. If Kuroto had delayed a second, then another pair of Rinnegan would have taken birth in the Shinobi World, but he made it in time and gouged out these eyes at the right time and interrupted their evolution.
This sudden interruption of the evolution caused a heavy injury to the pair of eyes. The injury would have been irreparable if it was a pair of Mangekyou Sharingan and in that situation, it would have been better to just destroy these eyes, fortunately, these are Eternal Mangekyou Sharingan and their visual prowess would be restored over time.
But the thing is, restoration should have taken a lot of time because of the injury. Despite Karin being responsible for the restoration, it would take at least five to six months for the eyes to recover their lost Visual Prowess as per Kuroto's expectation.
Unexpectedly, it's only been two months or something and the pair of Eternal Mangekyou Sharingan has already recovered to the point of being able to make Karin feel its alive characteristics.
He could only attribute the result to Karin's special physique, and thought, 'It seems that with the increase in Karin's physical strength, her ability to heal others has also improved.'
Seeing Kuroto silent, Karin became more and more nervous, she held Kuroto's sleeves, and asked, "Kuroto-sama, did you find something? Is something wrong with these eyes?"
Kuroto recovered from his thoughts, "Ah… I was distracted for a second." and shook his head and replied to her with a smile, "No need to be nervous."
Karin asked, "Does that mean there is nothing wrong with these eyes?"
Kuroto nodded, "Pretty much." And added, "I was just surprised that these eyes recovered their lost Visual Prowess much faster than my prediction."
Karin nodded, "I see." And asked in a puzzled tone, "This isn't a bad thing, right?"
Kuroto said, "Yes, it's not a bad thing." And added, "But here's the problem, since these eyes are recovering their lost visual prowess faster than my expectations, you won't be able to perfectly adapt to them in time, and soon they will start to affect you."
"This…?!" Karin was stunned.
Kuroto smiled and shook his head. This is pretty normal considering that this pair of Eternal Mangekyou Sharingan was obtained through unconventional means. It is like a by-product of the Kekkei Genkai Absorption Ritual that Danzo went through.
Since it is a by-product of that ceremony, it contains the obsession of almost all the shinobi who were part of the ceremony including Danzo who was its prime user. This is why controlling this pair of Eternal Mangekyou Sharingan is much more difficult compared to the orthodox pair of Eternal Mangekyou Sharingan, especially for Karin who is but a child.
Kuroto had planned to train Karin slowly so that she could adapt to these eyes over time, but since they are recovering faster, his plans are affected which is a little problematic. But all is not bad. Since these pairs of Eternal Mangekyou Sharingan are recovering faster, this also means that the Rinnegan can be created earlier than he initially planned, and now he will have to reformulate his plans.
Thinking of this, he couldn't help but look at Karin. He is a little worried that these changes of plans will put a lot of toll on her.
Perhaps Karin felt Kuroto's concern and smiled at him. Indicating that she'd be fine no matter what, she has the determination. To Karin, being helpful to Kuroto is the most important. She doesn't care about the consequences.
Seeing Karin's smile, Kuroto patted her head. If Karin has the determination, then Kuroto is ready to go through and start to reformulate his previous plans as per the current circumstances.
As per Kuroto's own understanding of things, there are two ways to create the Rinnegan using the resources he has in his hands.
The first method is the forced absorption of Visual prowess from the other pair of Eternal Mangekyou Sharingan to trigger the evolution of Dojutsu. This is the method Shimura Danzo was trying to use to evolve his Eternal Mangekyou Sharingan into the Rinnegan.
The second method is the transplantation method which involves the fusion of the Yin-Yang chakra. Karin will be the source of Yang Chakra and the two pairs of Eternal Mangekyou Sharingan will be the source of Yin Chakra. These Yin and Yang chakra sources will fuse over time and give birth to the Rinnegan.
Of the two methods, the first method will obviously take less time and will be easier, but at the same time, it is more risky and dangerous compared to the second method.
On the other hand, although the second method will be more time-consuming, and laborious, it will not be as risky and dangerous.
If he didn't have Karin, Kuroto would have chosen the first method, but since he has Karin, so the second method is his choice.
Besides, a difference of a few months will have no impact on his plans. Kuroto is not in immediate need of Rinnegan, so has all the more reason to go with the second method.
After making up his mind, Kuroto looked at Karin.
Karin muttered, "Kuroto-sama?"
Kuroto rubbed Karin's head, and said with a smile, "Well, since this pair of Eternal Mangekyou Sharingan has almost healed from the injury and is close to recovering its lost Visual Prowess, it's time to replace this pair with another pair of eyes that I have. Those eyes are also injured and require healing. Are you fine with changing the eyes?"
Karin nodded quickly, "Yes, I have no problem."
With that Kuroto took Karin to his laboratory and started the eye transplantation operation on her.
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