Evil Twilight Sparkle

I have a big question! What would happen to Equestria if Twilight Sparkle became evil during season five? The damage would be enormous, Equestria would be in ruins because all she would have to do to kill the princesses would be call an emergency meeting and then zap there dead well maybe not that easy, but still equestrian is doomed. All the royal guard do is sit there too so they would be no use because every big dangerous that happens the useless. Celestia trusts twilight to so she would have trouble hurting her and she ahs scars from sending luna to the moon. Luna, we don't know much about her, but my theory is that she would try to help twilight see the light but would fail. Last but not least cadence because she's the princess of love and not powerful she would most likely try and change twilight's mind and make her see the light. For the elements of harmony, the would be useless because the main person that controls them is evil and if it passes on to other people the might not know and they couldn't help. the civilians are mostly stupid so the won't be much help. oh! I almost forgot discord he would be sitting back watching all of this loveliness play out eating popcorn. Then there's Equestria's allies, the might be the only problem because there's griffons, zebras and other people. ( The reason I didn't list them where I was getting lazy.) Also, there's bound to be a resistance of some sort but the will be hindered because of twilight and not be a big threat unless there really good. That's all I have to say so put your thoughts in the comments below!