The Sage of Six Paths knew that Shihōin Naraku was powerful!
When he passed his power on to Naruto Uzumaki and Sasuke Uchiha, he had heard them mention Naraku.
At the time, when the Sage of Six Paths entrusted his hopes of sealing Kaguya Ōtsutsuki to the two of them and expressed his deep concern, Naruto and Sasuke both said that with Naraku around, the sealing would definitely succeed.
He had found that strange at the time.
Now that he had seen Naraku for himself, the Sage of Six Paths was even more puzzled.
His eye was keener than either Naruto's or Sasuke's, so he could naturally tell what level Naraku's strength had reached.
"Even without accounting for Shihōin Naraku's own abilities, the terrifying amount of chakra within him alone is already fully on par with Mother's."
Concern surfaced in the Sage of Six Paths' eyes.
He still vividly remembered how much harm Kaguya had once brought to the shinobi world.
If Shihōin Naraku also took the same path as his mother, it would be a disaster for the shinobi world.
It might even destroy this world!
"And where does his power come from?"
The Sage of Six Paths knew that his mother's power came from the God Tree, from the Chakra Fruit.
But Shihōin Naraku had no God Tree and had never eaten a Chakra Fruit, so where had the enormous amount of chakra within him come from?
He felt there was definitely a secret hidden here.
But judging by how wary Naraku was of him, Naraku clearly would not tell him the secrets of his abilities.
"That ocean-like... no, the amount of chakra within Shihōin Naraku has already far exceeded that limit!"
The Sage of Six Paths frowned in thought. "His chakra is like the boundless starry sky!"