Yeah, something like that. Maybe the challenge of the dungeon could be less about unlocking new portions to explore and more about shutting down whatever is causing the destruction piece by piece, eventually culminating in stopping the destruction of the Divine Beast entirely and giving you...
I like the idea of one of the Divine Beasts actively being destroyed while you're inside it. I mean that in the sense that the destruction happens in slow motion, gradually changing the layout of the dungeon over time, before eventually being reset due to some outside time loop. Progressing...