When Discord manipulates Rainbow to a point where she ends up bullying Fluttershy, something unlocks in Shy that Rainbow never expected in Fluttershy..Revenge....and Fluttershy will take that revenge too as far as possibly hurting Rainbow dash...
I am a beginning writer and like all of you, I will have some mistakes at first so if I ever do have any in my stories tell me kindly in a PM i will try to fix it ASAP!