With her horn destroyed and her body lame, Twilight must now start her new life as an acting earth pony. Along the way, she meets a handsome young unicorn stallion who catches her eye. In her heart, however, she knows that no amount of romance can keep her from knowing that, no matter what, she is no longer magic. What will become of Twilight? Will she ever learn to cope with being powerless? Can true love help her find light in her darkest hour?

All the King's Mares (Part 1): http://www.fimfiction.net/story/67892/all-the-kings-mares-book-1-2
Leader of the Pack (Part 3): http://www.fimfiction.net/story/71188/leader-of-the-pack-book-3-3