Part of a series of companion fics to each of the "Fiendship is Magic" comics.
Fiendship is Magic #1 Fanfic (Sombra) : Sombra Omega
Fiendship is Magic #2 Fanfic (Tirek) : Madness for Power
Fiendship is Magic #3 Fanfic (Sirens) : Music Wars
Fiendship is Magic #5 Fanfic (Chrysalis) : The Need for Change
Nightmare Moon may be reveling in her triumph over the Nyx and her newfound influence over ponies' dreams, but she is far from completing her goal of spreading eternal nightmares to all of Equestria, and far from completing her banishment of a thousand years upon the moon. Still, the Nyx resist her in their own ways for now...and back on earth, Celestia still has hope for the safe return one day of her little sister.
And, meanwhile, Nightmare Moon experiences her own bouts of distress. Sometimes strange 'nightmares' plague her--nightmares of love and redemption and the pony princess who she used to be. They don't come often, but whenever they do a strange confusion overtakes her. Slowly the years pass, and her confusion grows...until the thousandth year when, signaled by the bright light of her banishment's final full moon, everything the princess of the night ever was is finally set free to return to Equestria again.
"Now a long, long time ago, I gave in to the darkness so, I could have all the power, pitch black for every hour. And though she tried to stop me, I'll rise again, if slowly. For a thousand years I will prepare, this is only the beginning of the nightmare."
~Aviators, "The Beginning of the Nightmare"
Aviators Bandcamp