Place it just before the reveal in your edit, then follow it with WTF Boom for the payoff and save To Be Continued for the moment after the tension breaks.
關於此聲音
This is a nearly seven-second deep war horn blast linked to the Haradrim in The Lord of the Rings films, its low tone echoing and swelling rather than striking sharply. It feels ancient, heavy and threatening, giving a listener the sense that a vast force is about to appear. That weight makes a simple reveal feel ominous and far larger than the scene itself.