Yu had studied the power of the Sharingan thoroughly, so he naturally put that power to use in this battle.
As he approached Zabuza, his Sharingan flashed with a glimmer of red light, activating the Genjutsu inherent to the Sharingan.
Though this Genjutsu was weak and could only serve as a distraction, that was precisely the effect Yu wanted.
The sudden Genjutsu caused Zabuza to freeze for an instant. That was the perfect opening. Yu showed no mercy, swiftly swinging his blue longsword and piercing straight through Zabuza's neck.
Yet the expected scene of blood gushing everywhere did not appear.
The next second, Zabuza suddenly turned into a puff of white smoke, leaving behind a piece of dead wood.
"So it was the Substitution Technique. I didn't even notice when Zabuza used it. It seems I still underestimated a famous ninja like him." Yu sheathed his sword as he spoke, feeling slightly excited now.
Zabuza was currently hiding behind a tree over ten meters away. Though he had avoided Yu's attack with the Substitution Technique, a bloody mark still remained on his neck.
Had he not used the Substitution Technique at the critical moment, Zabuza's head would have already been severed from his body.
That Uchiha brat from Konoha is actually this strong. The Uchiha clan truly is full of monsters. Zabuza thought. He was extremely familiar with Yu's Sharingan, and several Uchiha ninja had died at his hands before.
Having personally fought Uchiha ninja, Zabuza understood deeply just how powerful the Uchiha clan was—especially those devilish eyes.
The word "battle" was no longer part of his considerations, because the gap in their strength was simply too vast. Across all three exchanges, he had been unable to contend with Yu.
Zabuza tightly gripped the Kubikiribōchō, which had already been broken