Tempest Shadow vs. Princess Luna... on Nightmare Night. Who's the scariest of them all? Who will win ponies' hearts as the true Queen of the Night?

A light-hearted, tongue-in-cheek battle of wills, and a celebration of one of the best holidays of the year.

Note: This story is set between Seasons 7 and 8, and makes use of the Tempest Shadow AU established in Reformation... It's a Pony Thing. (However, this story provides the necessary background, so it can also be read on its own.)