how to make floor break when u go to a certain area

[Mudbill]

You need a custom entity. It's easy to make, just open the grunt file in the Model Editor, go on Settings > User Defined Variables, then remove the music files from the DangerMusic, SearchMusic, and AttackMusic slots. Save it as a separate entity, for example servant_grunt_nomusic.ent

Or if you're lazy, you can just download the one I edited right now (had to make it an archive, cause .ent isn't allowed apparently).

Keep in mind that the loud static noise as a monster is chasing you will still be there and can not be removed with just a custom story. This only removes the music.