British and American Crossover: Hogwarts in the Marvel Universe

I wrote this on a whim when I was going crazy, and then, on impulse, I signed a contract for it. Now I'm building up my mental resilience. If you want to read this, throw your brain away first, then come on in (╥﹏╥) The characters are extremely out of character, folks. I was just hoping to enjoy a movie, but I accidentally transmigrated to another world. Anna Puri: “Where am I? This doesn't look like the modern era. I was just watching a movie!” The lazy System: “Since you've met some rather strange conditions, you've now transmigrated to the fifteenth century. You'll have to live here.” Anna: “Why, thank you!” Anna had planned to keep her head down and survive, but she got accepted to Hogwarts. I can understand Hogwarts, but what's Marvel doing here?! And why is there a Three-Body invasion, too (from another dimension)! Wait, what's this Mountain-Moving Project about (also from another dimension)!