There are several reasons Rarity stays inside on Nightmare Night. Because she's Generosity, and it makes more sense to be giving away treats than to go out collecting them. Because really, costumes are their very own fashion trends, darling, and there's only so much a reasonable pony can be expected to deal with per season. But mostly because when it comes to the truest holiday nightmare of Ponyville, the thing which sends colts, fillies, and adults galloping their screaming way into the night?

She's it.

(A stand-alone, no prior-reading-necessary part of the Triptych Continuum, which has its own TVTropes page and FIMFiction group: new members and trope edits are welcome. )

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