Looking for a fic I read awhile ago about twilight finding a magic book with a entity inside it in the everfree forest that writes to her and teaches her to use magic without her horn and eventually she binds the entity to herself. That's all I really remember

Edit: it's called Grimoire but I found out that the page is gone and I am very sad because it was an awesome fic

7321819 Fortunately, FimFetch has saved the story in question; just set the search options to mature and you'll find it.

7321827
Thank you so much!

7321834 De nada~