Naruto Manga Chapter 522: I'm Already Dead

Bound by Kabuto's evil impure world technique, Zabuza and Haku's minds are fading, being controlled by the technique. Just before the technique took over their body and minds, Kakashi has revealed to Haku how Zabuza felt about him, that he was more than just a tool.

Finally, the technique took over them and Zabuza's hidden mist technique starts. As the battle begins, Guy, Lee, Sakura and Kakashi notices the emergence of the rest of the "Generation of the Seven Swordsman of Hidden Mist".

Generation of the Seven Swordsman of Hidden Mist