Need some help finding a Fic.

Hey does anyone know the name of a Fic about Twilight finding this book in the everfree forest, and it talks to her and she learns Magic unlike her own, and in the first couple of chapters she uses it to make a large dirt spike come out of the ground? and all the while the book is speaking to her and progressing her powers and the book makes her immortal and blah blah she eventually wants too kill celestia, and then there is a sequel where she tries too find the being inside the book because it escaped?

I know this is weird to ask, but I can't remember the title or anything for the life of me, and I've checked all my libraries on FiMfiction and it's not there, I've been trying to find it for a while, so if anyone knows the name please tell me!