Demons are such single-minded creatures. Make a deal with one, and you might just get more than you bargained for. All Sombra wanted to do was save Luna, but the bargain has been made, the pact signed in blood, and in the end, it shall be completed no matter what.
Entry into the Equestria Daily Outside Insight Summer Contest.
Big thanks to my prereaders Soundslikeponies and Belligerent Sock along with my editors Malus Scriptor and Titanium Dragon for all their wonderful help!
Also a gift to my homie plumander, who is, like, totally awesome and stuff.