(Credit to Primogenitor34 for Cover-Art)
(Credit to smellyfeetyouhave and Thunder Blaze for the old cover-art)
(Now 20% CYOA... okay maybe a little more than that. Please use the [Continue] option to go from Chapter to Chapter. If you just want the straight up story, go green)

"It's going to be a long night..."

When a mansion appears out of nowhere in the outskirts of town, The Mane 6, are all invited to a housewarming by Specter Yield, the owner of the strange mansion. Hours after they leave to attend the party, the Cutie Mark Crusaders find themselves in this mansion. Eventually, Sweetie Belle finds herself alone in this massive mansion, trying to save her friends, and discovering the truth behind this haunted mansion. Will she be able to rescue her friends... and possibly all of Equestria from the ghostly presence?

Over a thousand years ago, the Crystal Empire fell. A darkness had invaded and to protect the kingdom, the princess was sent away, only to return when she was ready for her throne. A king rose from the turmoil to take the throne and led the kingdom with fear and darkness, and the ponies suffered until two sisters saved them by sealing them away. This is the story of the empire's fall.

Cover image found here.

King Sombra has a problem. A Twilight Sparkle shaped problem. The evil ruler of the Crystal Kingdom is about to be overthrown unless he can hold out until reinforcements arrive.

Seven days of keeping Twilight at bay. What's the worst that can happen?

All he has to lose is his self-respect and dignity...

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?