Only apple jack and rarity dies

Fluttershy, the shy, kind pony we have all come to know. Well, what if that's just what she wants you to think, what if the shy pony that we gave come to know has some....dark secrets, one of them being she's a masked murderer under her caring personality. I don't own any mlp characters or themes, this story is NOT meant for anyone under the age of 13, contains gore, violence, and a pony-who-everyone-thinks-is-shy-but-is-acctually-a-psyco.