Vesper Maran is a young girl, only she's not. Reincarnated in the past Vesper is perfectly content posing as a child prodigy, up until an invitation to Hogwarts arrives when she is eleven years old. Learning magic and making allies, this young witch is ready to take the magical world by storm, even if she dies doing it. Contains detailed magic and a Slytherin OC. AU canon-divergent