Hailey Potter and the Runes of Elemental Power

AU Philosopher's Stone. Harry Potter has a twin sister that we did not know of, up until she went to Hogwarts. Raised by James' younger brother, she grew up to be a prankster but a responsible and talented child. However, she got sorted with the snakes. Full summary inside. Disclaimer: I do not own Harry Potter. Rated T because I'm paranoid. A collaboration with Darklight Blue.