Yanbai looked at Tobirama Senju and nodded.
Yanbai had given Cherry Ink the perfected Living Corpse Reincarnation technique.
He had seen how desperately Cherry Ink wanted to live. It had grown so old that it was on the verge of death, and it kept begging Yanbai, repenting for all its mischief over the years.
It acted cute to survive, and made a fuss to survive, too.
Cherry Ink was very clever. It had known Yanbai since it was very young and regarded him as a god it was close to. It believed that, as long as Yanbai was willing, he could grant its wish.
Yanbai had seen off far too many animals with spiritual awareness. Some had left him on their own along the way, while others had received funerals from him.
Cherry Ink was the most obedient, and the only animal that would do anything for Yanbai without asking for a reward.
So Yanbai had made a few agreements with Cherry Ink and given it Orochimaru's Living Corpse Reincarnation technique from the Boruto era. Cherry Ink had also fulfilled the conditions it had agreed to.
Yanbai knew perfectly well that even if he did not do this, Orochimaru would develop the technique sooner or later.
And many people would undoubtedly die in the process.
Since Yanbai knew the technique anyway, he had simply let Cherry Ink try it first.
Cherry Ink constantly urged its descendants to expand the rats' territory. It then gathered rats from other clans on the nearby mountains and made them fight until only the strongest remained, choosing those rats as bodies to possess.
Whenever it was time to change bodies, Cherry Ink would launch a war between rat populations, unseen by humans.
To keep anyone from noticing anything unusual, Cherry Ink would endure the pain