Marching Towards Harmony

Crossposted from FiMFiction. This story is a prequel to Princess on the Road.

Mystic Amethyst is the youngest of two sisters. She and her sister Lapis Lazulight are the daughters of Empress Twilight Sparkle and Rarity Belle. Due to being born an unintentional alicorn, every waking moment of Mystic's life is agonizing due to her advanced fibromyalgia. As she grows, more magic is sapped from her body to help develop her wings and horn, and her body continues to change through the natural cycle of life.

The day she is crowned as the new Princess of Friendship is the worst day of her life, and her hatred of the title becomes obvious the longer time goes on. It doesn't help that the ponies she calls friends are also some of the most irritating ponies on the planet. But they'll have to work out their differences as they go, because a few months after Princess Mystic's coronation... she and her friends are called on a mission by the Cutie Map. The only difference is they won't be staying in Equestria; they'll be exploring the unmarked territory outside it.

If they're ready for the challenges ahead, the unforgiving lands outside Empress Twilight's gaze await their arrival with open hooves and arms.