Chapter 164: Classic partners, get off the hook
After using Kotoamatsukami twice in a row, Naruto immediately felt weak.
But this is not really 'weak'.
Naruto knows very well that his physical condition is very good now. It's just... he seems to feel the loss of his life force. And this loss should be the side effect of using this on Mangekyo Sharingan ability.
He also discovered a limitation of his own eyes ability.
That is, after using 'Kotoamatsukami', in the short term, it is highly unlikely that he can use it anymore.
Because the feeling of 'can change the thinking of others' is gone.
It can be used again a few years later.
But it doesn't matter.
If it wasn't for confirming his guess, if not necessary, he didn't want to rely too much on the power of these eyes. After all, he couldn't close Sharingan. He could clearly feel that these eyes seemed to kill his life force all the time.