Hyuga Kagami stared gloomily at Karin on the operating table and asked, "How are you feeling? Better now?"
"My lord, I'm fine."
Karin, her face covered in cold sweat, answered weakly.
Hyuga Kagami sighed. "Sigh, forget it. Let's stop for now. You should get some rest."
As he spoke, he gently patted Karin's shoulder, then turned and sat down on a bench nearby.
Just moments ago, Hyuga Kagami had performed a First Hokage Cells transplant on Karin. However, the operation had not gone smoothly. In the end, he had no choice but to use the Giant Tenseigan's chakra-absorbing ability to urgently extract the "Wood Release" chakra from Karin's body, barely preventing the First Hokage Cells from completely running rampant within her.
Hah, this step really isn't easy!
After letting out a breath, Hyuga Kagami silently reflected.
He had long known that Nagato's method of overcoming his disability and improving his physique was to transplant First Hokage Cells, merging the bloodlines of the Uzumaki Clan and the Senju Clan to obtain a Sage Body close to that of the Sage of Six Paths. Yet he had never transplanted First Hokage Cells into Karin, and this was why.
First Hokage Cells were not so easily fused. Just because Nagato could accomplish it did not mean Karin necessarily could.
At present, only Uchiha bloodlines and the Sharingan had clearly proven helpful in transplanting First Hokage Cells. The vast majority of successful First Hokage Cells transplants were related to the Uchiha and the Sharingan.
For example, Madara Uchiha, Obito, Danzo, as well as Shisui, Itachi, and Shinichi, whose transplants had succeeded under Hyuga Kagami's care.
Because the Yin Release chakra contained within the Sharingan could effectively neutralize the Yang Release chakra contained within the First Hokage Cells, the more powerful the Sharingan—or the greater