I'm looking for a short (OneShot) )story, where Faust is Celestia's daughter, and Equestria, their whole world was dying and Celestia and the Mane Six (I think they were there too) was saving Faust by sending her on Earth, turning into a human and asking her to always remember who she is and the world she came from, after what, years later, she (Faust) is shown as a creator of cartoon MLP: FiM.