As Hearth's Warming draws near once again, Twilight receives an invitation from Sunset Shimmer to celebrate Christmas in the Human World. Excited to research a foreign holiday, she accepts only to find a little bit more than she bargained for.

Convinced she'll never find peace after the Anon-a-Miss incident, Sunset Shimmer decides to leave Canterlot High for good. When her friends go after her, they wind up getting lost and falling underground. And when Sunset falls in after them, she's left with a choice.

Escape to the surface and keep her sanity or risk losing herself in the darkness.

Crossover with Undertale. Comission from calinjc

This story is a sequel to From a Shimmer to a Shine

The prodigal daughter has returned. After a long struggle, Sunset Shimmer has righted her wrongs to return to Celestia's side. But all is not well in Equestria or on Earth, as a familiar face aims to exploit both worlds. Can the threat be stopped?

During Discord's reign of terror, he stops by to torment a certain unicorn DJ.

Sunset Shimmer has fallen from grace. After her humiliation at the Fall Formal, she now faces a long road to redemption.

But it's not easy, most of the others refuse to accept her, and new enemies threaten to drag her back into darkness. Can she find her way to the light?

EDIT: Well how about that. Hit the featured box as of January 4th, 2018
EDIT 2: Will wonders never cease? Featured box AGAIN as a February 16th. I'm sensing a theme here.