Place it as the payoff after the reveal, then cut straight to the reaction shot. Pair it with It Was At This Moment He Knew just before the line lands, and follow it with Darth Vader Nooo for the defeated response, letting each beat land before the next clip starts.
About this sound
This is a German-language spoken line, just over eight seconds long, in which the speaker threatens to burn someone's children. It feels menacing and deeply unsettling, carrying the cold confidence of a villain stating an intention out loud. It lands hardest when that threat is the focus of the scene, not a passing remark.