Labyrinthian World Idea

I had an idea for a world inspired by classic fantasy RPGs and the idea of "dungeons."

The world would be a dark fantasy realm where magic is rare and volatile, and monsters are seen more like dangerous animals. The main star of the world would be the subterranean ecosystem. I imagined a massive labyrinth of interconnected tunnels that slowly grow in size and adopt unnatural phenomena the deeper you go. From small surface cages to the ever-deep magical abyss; the labyrinth would hide magic and mysteries that beg to be explored.

I think it allows for an interesting premise that still feels somewhat classic in a sense, something that could work for all my ideas and allow me to play with some speculative evolution and hypothetical sciences. I have written notes about my ideas, though most of it is garbles nonsense and I just wanted to see what other people thought?

If there is another world like this, id love to know as it could help inspire me in some way! I know there are some anime with similar premises, and obviously Metroidvania games, but I'm up for any inspiration!