Luna's dark decent

Many years ago before the elements of harmony were discovered in equestria. There were two sisters one of the night and one of the day. The kept glance in equestria, until something changed that balance. The scale was tipped into the favor of the night and the first solar eclipse was created.

Luna was in her royal chambers sleeping during the day as such she did not notice the blackened sun that threw equestria into terror. However something else lurked in her chambers as a thick black fog rose and a mysterious black alicorn, without any features no cutie mark, and no face,approached the sleeping princess. The mysterious alicorn made a chuckle and opened its mouth to show eerie white teeth that seemed to glow against the black "so princess of the night I shall give you its true power...and I shall let you have it unnoticed until it strikes and creates how you should be..." The fog rolled over the sleeping princess and surrounded her entering her with every breath she took. The mysterious pony smiled wider then turned and it disipated into the rest of the black fog, and the sun shone once more. No trace of the fog or the alicorn.