C29 I Need to Take a Mission to Kill Someone!

Didn't he, Kakashi, in the original work, not have the confidence to fight against all kinds of Kage Level experts just because he mastered an S-ranked ninjutsu, the Lightning Cut?

Furthermore, although Kakashi had mastered an S-ranked ninjutsu, he was not proficient in using it. Without the assistance of the Sharingan, he was completely unable to unleash the power of the Lightning Cut.

However