Cadance and Twilight have discovered something about the Alicorn Amulet. Whenever someone rejects its promises of power, it weakens the Amulet's magic. They summon the help of volunteers from across Equestria, in the hope of destroying it for good.
Anyone who has sought counsel from Princess Celestia has met Raven, her most faithful aide. She has been a veritable second shadow to the princess for as long as the castle staff can remember... longer than they can remember, in fact. Much longer.
My unicorn parents called me a worthless mud pony. They pushed me every day to overcome my lowly status. When I woke up one morning with my cutie mark, I thought they would love me. I couldn't have been farther from the truth.
One day, something terrible and unexpected happens to Celestia, and time is lost to the sands. She'll find that her entire world is gone and that almost everything she knew and loved has disappeared...forever.