...The wise and powerful king Solaris raised the sun to start the day and brought forth the moon to begin the night. He ruled over the kingdom bringing peace and harmony to all the different types of ponies.
But all was not well, for a great darkness hung over his beloved subjects and in his efforts to find a solution he came across a messenger of miracles.That messenger granted young fillies the power to banish the darkness, to wield magic never seen by ponydom.
Over time these 'magical fillies' grew in number and strength, but so too did the darkness grow to match their power. It said that one the thousandth year since that first fateful meeting, the darkness will become a creature so powerful that will drown all in darkness and cold.
The Nocte Equus.