The Crystalling (Part 1).Twilight and her friends are invited to the Crystal Empire to attend the Crystalling, a magical ceremony honoring the birth of Shining Armor and Princess Cadance's newborn baby. Twilight brings her new pupil Starlight Glimmer to the empire to reconnect with Sunburst, her estranged childhood friend, as her first friendship lesson. Starlight is anxious to keep Sunburst from learning of her past villainy and tries to avoid the reunion. They eventually meet, and following an awkward conversation with him, Starlight assumes Sunburst to be a successful wizard who has moved on from their friendship. Meanwhile, Twilight and her friends are shocked to discover the baby is an alicorn filly with powerful, uncontrollable magic. The baby cries shatter the Crystal Heart that protects the Empire, leaving the city exposed to a deadly snowstorm.