Place it at the exact moment a plan is revealed in your edit, after a slow build with the X-Files Theme and before the fallout. Follow it with the Shocking Sound Effect to sell the twist, then cut to the reaction shot before the moment passes.
关于此声音
The Isengard clip is a brief sound lasting just under five seconds, centred on the name itself and delivered with a low, weighty presence that hangs in the air. It feels tense and foreboding, like a warning issued before something large and unwelcome begins, and it works best as a short, dramatic punctuation rather than a long piece of music.