Put this clip as the reply beat after a reveal in your edit: open with the metal gear alert sound to flag the discovery, follow with this line as the response, then close on a short reaction sound rather than another quote.
O tym dźwięku
This is a two-second voice clip of Bill Cipher delivering the line 'I know lots of things' in his high, taunting cartoon voice. It lands as smug and unsettling at the same time, like a villain who is enjoying being several steps ahead and wants everyone in the room to know it.