Between the banishment of Nightmare Moon and her revival as Luna, Equestria was blessed with one thousand years of prosperity under Princess Celestia. There are some historians today who call it "The Dawn Age", though it ended only recently. And yet, for a small group of ponies hidden far from other civilizations, Celestia's golden age was anything but.
Luna's Children of the Night were originally a group of twelve foals whom she rescued from poverty and starvation. She whisked them away in the night to serve as the founders of a new colony - one for which, eventually, she was punished. Still, even after her banishment, her Children lived on, tucked away in mountain ranges far beyond the sight of the sun.
So, over the years, what became of these children?

Based on the MLP fan animation Children of the Night, which can be found here.