When Twilight was a young filly, she was still quite gifted with magic. During one of her study sessions, she discovers a spell(quite easy to cast) That allows her to travel to a realm filled with knowledge eternal. When she brings this up to Princess Celestia, She erases her memory of this spell. Many years, Twilight has grown older and moved to Ponyville were shes had adventures big and small. But when Shes given the chance to relearn this spell, will she be prepared for the consequences and will she be prepared to face what was left behind?

Note: AU tag added because of non-alicorn Twilight