Battle Again for a Hundred Years

Under his meticulous observation, everything inside his body suddenly became clearly visible. Every organ, every blood vessel—once he deepened his eye power, he could even see every single cell.

The time-slowing eye power spread through his body, yet wherever it passed, it still had no effect. His heartbeat did not slow in the slightest, and his blood continued flowing as usual.

But under such minute observation, Shin was able to discover where the problem lay.

Inside his body, his cells were constantly moving, producing an endless stream of chakra. It was then delivered throughout his body to his eyes, where it transformed into eye power and radiated outward.

It could be said that these chakras were the source of the Time Eye Technique. If so, how could it in turn affect itself?

When treating an illness, the greatest fear was being unable to find its cause. Now that the problem was finally clear, he could naturally prescribe the right remedy.

However, Shin had already activated his Rinnegan before, yet he had never been able to observe things so minutely as he could this time. This was a first.

"Sure enough, I've reached a bottleneck. Has even the Rinnegan's ability begun to advance further?"

"If chakra originates from the body's cells and serves as the source of time eye power, making it impossible to use on myself... then what if I increase the proportion of Sage Art energy?"

After considering it, Shin began trying it step by step. Sage Art energy differed from energy originating in his own cells; it was a natural energy that existed everywhere and did not originate from the Divine Tree.

That was why Sage Mode could injure a Ten-Tails Jinchuriki protected by Yin-Yang Release.

In ancient times, before ninja had appeared, it was the age