It isn't the only one though, is it? [ But "universal" isn't always the case. The world of the She that he knows of at home... he doubts that's anything like his own world. Everything is magic there. They, themselves, are fairy people so... uh. ]

Theory we definitely have, though I don't know if you'll get a manual on how to control magic. [ He grimaces. ] It's mostly trial and error, usually with supervision of someone who has mastered it a bit more.