Parenting is never the same experience twice. Night Light and Twilight Velvet know this, as their two children were different in their own ways growing up. You can't always predict the kind of pony a foal is going to become, and if you'd told them both kids would become national heroes, they'd have laughed themselves to tears!

Princess Celestia and Luna have been surprised, as well. It's no exaggeration to say Equestria would've been doomed many times over without Twilight Sparkle and Shining Armor. But what if someday, a new threat arises neither of them are able to stop? What if said threat requires a new hero of Equestria; a third progeny of Velvet and Night, one with their own unique gifts and talents?

Night and Velvet are getting a little old to have another baby. Whatever spark they had may have been lost in their advancing age, and the time for a third savior of Equestria may have passed...

...Or has it?

Picture by nsfwbonbon.