Description:
After her banishment to the moon Nightmare Moon probably vowed to return and given the prophecy her future return seems to have been known at least to some back in Equestria too (presumably including Celestia).
This vector of Nightmare Moon is based on my earlier vector of Princess Luna (I changed the colors, some proportions, the wings, mane, tail, helmet, the eyes, the cutie mark and made minor adjustments to the pose).
