Put it at the end of a build-up, just before the fight or reveal lands, then follow it with a heavier impact. For a longer anime sequence, open with the Mangekyo Sharingan cue, use this clip as the turning point, and close the moment with the Za Warudo time stop before the next scene.
Über diesen Sound
This just-over-a-second voice clip has Retsu Unohana speaking the word Bankai in a low, steady tone before she releases Minazuki. It feels tense and quietly threatening, like calm held just before a brutal strike. The line comes from Bleach: Thousand-Year Blood War, during her fight with Zaraki Kenpachi, when she finally shows the full force she had kept hidden.