Cozy glow has turned evil! Or has she?
After Equestria started losing its magic, Twilight Sparkle and co. have left to find the culprit, leaving her school undefended. Then Cozy Glow mysteriously became Head Mare after Starlight Glimmer disappeared! Something is definitely up with that filly. But they can't help but wonder if something else is at hoof in the school of friendship.