Dark Equestria, Part 1Once upon a time, in the magical land of Equestria, there were two regal sisters who ruled together and created harmony for all the land. To do this, the eldest used her unicorn powers to move the moon across the starlit skies. The younger brought out the sun, when the bright light was called for. Thus, the two sisters maintained balance for their kingdom and their subjects: all the different types of ponies.
But as time went on, the younger sister's pride made her grow resentful. She envied the beauty of night and wished to impose the blazing light of her sun on the ponies and the world all the time. One fateful night, the younger unicorn raised the sun in challenge to her sister's beauty and glory. The elder sister tried to reason with her, but the overweening vanity and pride in the young one's heart had transformed her into a wicked mare of blazing fire: Hellion Queen. She vowed that she would burn away the night, blot out the stars and banish all rest.