In the lands of Equestria, where magic is might, but also the thriving pain and misery, the lands of once peace and happiness now a perverted version of themselves. All the lands have suffered and only misery remains with company, Nightmare Moon has control her reign unable to contain the suffering spread. Celestia a sex slave in her own kingdom, the mane six, a broken band of memories dragging onwards in these desolate times.

All happiness is forgotten, all that remains is a dull emptiness, and the remedy? Pain.
But even in these times, there are stories that are told of the few things that can still be found, a relief from this pain of emptiness, lust, sex, greed. And who else fits better into that role? Rarity of Ponyville, the once beautiful mare of fashion, now the perverse mistress of pain and greed, her generosity a thing of the past, her needs, her desires drive her towards great things of terrible consequences, but in these terrible times, she is the lesser of two evils isn't she?

Her story is but of many. Keep in mind the idea was mean to focus on her, i've changed the fic.

Anthro/humanized ponies, sexual scenes, some minor violence, but mostly sadism.
Art from Slugbox, and various other sources.