It turned out Yinsen was serious. He really did use only the most basic taijutsu and swordsmanship, yet he still beat Sasuke, even with Susanoo activated, into a miserable state.
At first, the proud Sasuke had not planned to use Susanoo. He felt that Amaterasu and Kagutsuchi alone would be enough to deal with Yinsen—even if Yinsen used that terrifying Wood Release, Amaterasu's all-consuming flames seemed perfectly suited to counter it.
Sasuke had overthought it. Even after activating Susanoo, its once-terrifying defensive power seemed nonexistent before Yinsen. A few heavy punches were all it took for Yinsen to smash Susanoo apart.
When the sparring match ended, Sasuke sat on the ground panting like a dog. Maintaining Susanoo for too long was a tremendous burden on his Chakra, energy, and even physical strength.
So while Sasuke could use Susanoo for now, it was not yet a Complete Body. He could only summon half of it, and it barely possessed flesh and sinew, without even armor.
"How could this happen?"
"Because your Chakra, physical strength, mental willpower, and combat experience are all lacking... Even your use of Susanoo has only just begun. You caught the faintest glimpse of what a truly strong person looks like, and you already became arrogant. That personality of yours really needs to change."
Sasuke's face turned bright red from the reprimand. In the past, he would never have admitted it, but after Yinsen had repeatedly humiliated him and mercilessly pointed it out to his face, he had accepted that his personality was flawed.
"I think you should train in the Anbu for a while. At the very least, joining the Anbu would broaden your horizons and keep you from constantly making the same mistakes."
In Yinsen's view, the biggest reason Sasuke always came across as proud and