"Itachi, try activating your Sharingan."
Kimura Takuya rubbed his hands together. He'd forgotten to block the pain, and cutting his hand had hurt a little.
He set down the scalpel and turned to let Itachi try opening his eyes.
"Open!"
One of Itachi's eyes had the more complex Eternal Mangekyō Sharingan, while the other was an ordinary Sharingan.
Itachi could feel the difference in their ocular power, too.
One was overwhelmingly powerful. The other was not only weak now, but even at full strength couldn't compare to the first.
So this is the power of the Eternal Mangekyō?
It wouldn't run dry or leave him blind, and the Kotoamatsukami genjutsu it contained no longer had such a long cooldown.
If the Kotoamatsukami in an ordinary Mangekyō had a ten-year cooldown before, then the Kotoamatsukami in the Eternal Mangekyō had no cooldown at all!
It simply had no cooldown!
This was what infinite, eternal ocular power meant!
In other words, this eye had no chakra bar!
That didn't mean its energy was infinite in quantity; rather, it flowed endlessly, without limit.
That was also why Uchiha Madara could battle Senju Hashirama for three hundred rounds when Hashirama had activated Perfect Sage Mode and possessed an infinite supply of Senjutsu Chakra.
Because they were both heroes with no chakra bar.
It also explained how Sasuke could trade blows endlessly with Naruto, who had a portable charger with him in the later stages.
Kimura Takuya could clearly sense the difference between the two through the Soul Energy within Itachi. After observing for a while, he spoke.
"Itachi, I can sense a subtle difference between the energy frequencies of your two eyes. Perhaps that difference is the secret behind the Eternal Mangekyō's power. Would you mind if I studied it?"
"This..."
Itachi fell silent