There’s a popular theory that Grogar created Discord out of a pony and other animals. That made me think and realize it would really fit the Beauty and Beast story arc of Discord and Fluttershy. The one missing set piece is Discord turning into a pony and possibly getting together with FS. The only thing that could make it possible is Grogar confronting Discord and stripping him out of his power. Grogar use magic that have similar color to Discords when he was evil.