Trapped in a future where Twilight--now known as Andromeda--has turned into an uncaring, emotionless dark-magic wielding empress, Rarity sometimes contemplates just... you know... accelerating her trip to the heavens, so to speak.
On one such time, she's surprised to find it's Andromeda of all ponies who makes her change her mind.
Takes place in an AU by Maximasmac (a brief explanation of the AU is inside the story). Artwork is also by Maxima and depicts Andromeda.