Place it near the end of a fail sequence, after Enemy Spotted warns of trouble and just before the wipe, then follow it with No God Please No for the reaction shot.
Über diesen Sound
This five-second clip catches Zabi laughing softly before announcing, in a bright, teasing voice, that everyone is going to die. The giggle undercuts the grim line, making it feel gleefully doomed rather than frightening, like a joke shared just before disaster. It comes from Eiyuden Chronicle: Hundred Heroes, where Zabi delivers the line.