For a long time, peace has been going on in Ponyville, however recent nightmares have been hitting Nyx hard. What's worse is that it turned out there are more children of Shadow members and they are out for revenge. What's worse, their leader wants the group that eliminated Dark Shadow dead. It's now up to Nyx, Rainbow, Nyx's family, Tex, the Mysterious Dragon Blaze, and Nyx's alter ego, Dark Nyx, to take down Onaga
Nyx belongs to Pen Stroke and this isn't a sequel/side story of the original Past Sins.
with help from Nightmare Nyx
Rainbow has to watch over Nyx for a few months while Twilight is in Canterlot.
Twilight, Nyx and Rainbow give Lunar a tour around ponyville, but they discovers something that he didn't even know that remains in him.11
Nyx is starting to get lonely and wants a friend for her own. but a mysterious dragon shows up and is searching for a friend also
Nyx and her family travel to the Crystal Empire to spend the holiday there.
Danger is on the horison and the children of shadow are out for revenge on Nyx. It's up to Nyx, her family and a mysterious dragon to take down the leader