This ... is Super Twilight Sparkle.

On the ruptured and broken landscape that was the dying planet, the transformed unicorn faced her greatest adversary yet. She has lost nearly everything dear to her to this vile threat, and she is determined to stop it from ever hurting some one again. Her rage has destroyed every barrier that was inhibiting her full power, and its radiant glory is evident in the transfiguration wrecked upon her body. She has only one goal: destroy her titanic foe. At any cost.