Every time you throw or have the Beacon to the Beyond trinket ready, the game will play a Starcraft sound referring to a nuclear attack.
You need to download this folder and put it in the same directory where WoW is installed as in the following photo
Download link -> https://drive.google.com/drive/folders/1g0hvXdiNE9wZiHhL35pC0ZbzeyfiKY5z?usp=sharing
If you want to see a video of how it is heard in game, here you have a reference with the audio in Spanish -> https://twitter.com/Cynox336/status/1667688158811529217?s=20
Spanish version -> https://wago.io/0tcgnyN1X