Ninja Cats... No, From This Day On, They Were Sage Cats!

At this moment, Uchiha Ensei had completely mastered the creation, use, and principles of Sage Chakra Seeds.

Although he had not learned true Sage Power, this Sage Mode could likewise enhance Uchiha Ensei's own strength, and it could not be absorbed by the Rinnegan.

Or rather, it could not be completely absorbed.

In truth, the Rinnegan's Sealing Technique: Absorption Seal could absorb Natural Energy, but the absorbed Natural Energy could not be controlled and would backlash against the user. Moreover, it was absorbed much more slowly than Chakra.

Therefore, after mastering Sage Mode, Uchiha Ensei would no longer be as helpless as before when facing the Rinnegan.

But this alone was clearly not enough to kill Madara Uchiha. He had to wait for a foolproof opportunity before choosing to make his move.

Thus, while considering how to kill Madara Uchiha, Uchiha Ensei injected a seed capable of independently synthesizing Natural Energy into the Ninja Cat before him.

The prerequisite for cultivating something like Sage Chakra was having enough Chakra within the body. Only then could the external Natural Energy remain stable.

Otherwise, the stone toads on Mount Myoboku were the perfect example.

Naturally, the Ninja Cats of the Ninja Cat Clan could not meet that requirement.

But that was fine. Uchiha Ensei had previously succeeded in creating a semi-finished product by implanting a core capable of carrying Natural Energy.

Its principles were similar to the Yin Seal, and it was made from White Zetsu Cells. Uchiha Ensei had originally prepared it for himself.

Because according to the original plot, neither Naruto Uzumaki nor Jiraiya had been able to store Sage Chakra in their bodies. They needed to synthesize it during battle or have someone help refine Sage Chakra for them.

However, after a hundred thousand Byakugan had been sealed inside