Once upon a time in the land before Equstria, two young ponies would grow to fufill their destinies

Just as dark clouds can bring rain, therefore life, they can also bring storms. Terrifying storms that rattle houses and burn forests. As is with the Truth. Not only can it open one's eyes, but it can also terrify.

Long before the peaceful reign of Celestia after Luna's banishment, The two sisters lived in harmony. Cycling through day and night with each other, inseparable to say the least.

Newly alicorned Twilight if shown a secret library by the Princesses that hold a more in-depth tale of NightMare Moon but There are some things neither sister wished there was.