I can see it being a fic about a MLP: FIM fan that wind up in a dark warped version of Equestria when he came upon a curse MLP fan card-like game with villains of MLP: FIM all playing the role of GM (Game Master) like Discord, Nightmare Moon, Queen Chrysalis, King Sombra, Daybreaker, Grogar, etc in the world of the game while the mane six and rest of the cast are somewhat warped and corrupted versions of themselves as some of the characters and cards (and minions of the GMs) within the game. I can easily see Discord being similar to Leshy being a somewhat neutral GM that will sometimes help the main character in dealing with the other GMs but only in a way is entertaining to him. And I can see the GMs and other characters sometimes breaking character and fourth wall within the story/game. And maybe the second act can take place in some similar to an alternative version of the Equestria: Fallout setting.