Put it just before the reveal in your edit, then follow it with the Dun Dun Dun sound and the Vine Boom sound for the final beat, keeping it as the setup rather than the climax.
关于此声音
Pagan is a short five-second sound effect built around a single ominous cue, with a stark, ritual-like quality that makes it easy to recognise in a busy edit. It gives listeners an unsettling, tongue-in-cheek sense of drama, as if something forbidden is about to happen, without ever becoming too serious to use in a joke.