This is the 4th story of the Nyx Chronicles, and it is the holiday special.

Nyx, Tex, Spike, Rainbow Dash, Twilight, and Lunar Eclipse travel to the Crystal Empire to spend the holiday season of hearth's warming there with Twilight's family. Twilight and Lunar Try to decide what they should do for the family. Rainbow Dash struggles as she decides what to give Nyx as a gift for the holiday. Nyx meets a mysterious filly who has unique magic powers.

Nyx belongs to Pen Stroke.

This is an unofficial sequel to past sins