AU Crossover fanfiction - If Regina Mills were sent to another realm by her jealous sister and found herself in the realm of Harry Potter's Wizarding World... what would happen? Let's find out! This is a slow burn, AU Crossover story. The idea is my own, even though I do not own the characters. TW! Dark and Mature Themes ahead! Including (potentially) torture, murder, toxic relationships, etc. She is the evil queen after all!