Young!King Sombra x Unicorn!Reader (Shadowed Embrace)

You, a sweet mare from Ponyville, went to explore the newest kingdom in Equestria, the Crystal Empire. You came across a spot with an odd piece of something laying there, which you took back as a souvenir. Unbeknownst to you, it was a bit of King Sombra's horn.

This is the terribly written tale of of a girl falling for the bad guy. You have been warned.