Discord’s lack of empathy and a pony's sensibility has been tolerated by Celestia, but while both the princesses and the bearers of the Elements of Harmony struggle with even more dire problems, Discord is forced into a lesson of his own.
Discord haunts Twilight's dreams as she and Luna share romance. Celestia frets over Discord's seal. There is more to the the story of these three ancient beings than meets the eye, and Twilight Sparkle is about to get a crash course.
Twilight gets a bird feeder in the hopes of studying local birds up close. What she gets instead is a day full of frustration as the bird feeder mysteriously empties whenever she looks away.