I mean, take Harry Potter for example. The magic in there is very ambiguous in my opinion. But it still works. The reader is given just enough rules and structure for this magic while leaving a vast majority of it to the imagination. Some fans who write fanfiction for Harry Potter have come up with detailed amounts of rules and structure to explain how and why the magic in their fanfic works the way it does or even how magic exist and all that. They give more depth, more possibilities, whole new realms to build on what are already in the books. And, well, lots of it are viable ways for magic to work, even in the Harry Potter books themselves.
And this is because J. K. Rowling left a lot to the readers imagination.
Maybe she does have detailed descriptions for exactly why and how her magic works in a journal of hers somewhere, but if she does I haven't heard anything about it and so it gives fans something to fill in with varying theories. And that's fun. That is something I would love to give to my readers, heck, even to myself.
I mean, if I were to give rules and structure to every little single thing there would be no flexibility, no ambiguity, and without those I believe the whole appeal of magic kinda goes away. Cause where's the magic in that? At that point, it would kinda be reduced to science, I think.
So I'm going to plan what needs to be planned, keep blank what can be left to the imagination and give space for there to be many theories and ideas abound to any reader who comes across my book.
What do you guys think about this? Do you think that some stuff about magic should be left to the imagination? How far is too far when it comes to planning magic, in your opinion?