In a steampunk reimagining of the universe, Twilight Sparkle finds perhaps the one pony as lonely as she is. It's rather unfortunate that they're on the moon.
Human isekai'd into Equestria, regular stuff, right? Wrong! He knows nothing of the show and he took over the body of Prince Blueblood. Shenanigans ensue.
Right before the Elements struck, the Nightmare unleashed a spell out of desperation. A substitution spell. Otherwise known as the correct use of Kawarimi.