Tip: By pressing Shift while placing event tiles, they will be made "silent" and will not appear until a map transition happens. Always use silent event tiles to draw paths in other maps (i.e. a Vanilla Dome event while the player is on the main map), or glitchy tiles may appear.
This music plays in the Brannoch Castle area in Quest 64. This theme will mostly fit in a final bowser course or an intense level with a dark atmosphere on it, kind of like how Brannoch Castle is in a gloomy region with a purple skybox.