As Zaraki overcomes his mental shackles, he finally lands a killing blow on Unohana. In his victory, he finally hears the voice of his Zanpakutō, Nozarashi , for the first time.
Bleach: Thousand Year Blood War - Episode 10 Discussion Thread Bleach: Sennen Kessen-hen Episode 10
She activates her Bankai, Minazuki , which manifests as a dark, blood-like substance that extends her reach and heals her wounds. As Zaraki overcomes his mental shackles, he finally
