The Fluttershy Effect

Prologue:

My name is Twilight Sparkle, I'm the Princess of Friendship. I am a Unicorn who lives in Ponyville, Equestria. I was raised in Canterlot as an Upper-class citizen. Though, for this, more details will come as needed.

You see, for the past few months or so, I've been scared of the future. What I saw shouldn't have been seen by anypony. A Cutiemark is a biological sign, triggered by both science and magic as well as circumstance. Due to this, both magic and science could change aspects of your cutiemark. One pony found out how to do this. Her name? Starlight Glimmer.

Starlight Glimmer had found the ability to utterly remove a Cutiemark, and it's magic. At the time, we had no idea what this meant. But through experience, we found that it did the following: 1, Inhibit what ever the Cutiemark said was your ability. 2, Reduce your personality to a lesser form of your true self. 3, though I'm not all sure how this happens, it seems to reduce your physical ability, including flight, magic and general ability such as movement and thinking.

Ever since that day, I've been researching and experimenting on a minor scale to see if I can find a cure; Find an antidote to this spell's effects. Anything from genetically modifying Poison Joke to old legends created long before Celestia was born. One of them, created in 286BC, was said to have a plant that could cure any ailment... It was just a (Now extinct)  Adamanti Lily. The closest to a healing property it had was the fact that it was high in fiber and could clean out your body of some minor bacterial infections.

In the expanded Royal Canterlot Library, I found an ancient spell written by Starswirl the Bearded. He deemed both impossible and stupid. But I, will perfect this spell just like I did the Magical Mystery Cure. This spell combined both his research on Time and on Cutiemarks. The time aspect was that it could, in theory reverse any effects by rewinding the clock but keep the memories- as if you only changed the aliment's time-line.

That day, I gathered my friends together. We all were in the Hall of Harmony, a place in my castle where the Cutie Map resides. This is the place where many great things happened... if only this was one of those times...

My five closest friends were with me in that room. Applejack, Pinkie Pie, Rarity, Rainbow Dash and Fluttershy. Though we have only been together for a little over a year, it feels like we've been together forever. In fact, I barely remember my life before them. Fluttershy was the closest to me, while I remember Rainbow Dash being the farthest away from me at the time. We all agreed in that room that we would take down Starlight Glimmer through any legal means.

I was in the middle of casting the spell... but then... it began to backfire. The sheer power I put into it couldn't simply leave peacefully, no. Energy can't just disappear, it has to go somewhere. I had two options at the time. 1: Release all of the energy, killing all of my friends and all of Ponyville, leaving a large crater... or... 2: Go through with what ever happens. Since I like my friends, and I like being alive, I went with option 2.

Since I Knew that I haven't used this much power since the Magical Mystery Cure: a Spell that was used to bring your destiny straight to you at the cost of drastically changing everyone else's... Only one phrase came to mind.

“Please forgive me...”