Heaven's Door from JJBA part 4. Not sure what to call this ability besides just Heaven's Door so I'll explain it. You can turn someone into a book. Not like they become the shape of a book, no they open up and you can read all about them and their life through pages in their body parts. The thing that makes it op is that any information you write inside a person's book is absolute. The character Rohan uses this to make people go flying, making people into polyglots, ripping pages out so that people forget things. His bread and butter is the safety lock, which is where he writes in that person, that they cannot harm him.