Myths and Birthrights side-story: Velvet Sparkle recounts her younger years in a nation north of Equestria and the events leading up to her becoming the mother of Shining Amour and Twilight Sparkle
It is not every day that you learn that a monster of legend is real, let alone friends with Rarity. If she had heard of the old stories, perhaps she would be more cautious. Or more daring. (RGRE) {Has first and second person versions}