Twilight's convinced Discord hasn't really reformed, and has found a weapon to replace the Elements -- a reforming spell Discord missed eating. But a cornered draconequus is a dangerous beast...
After the first Gala since her Return, Luna considers what her experience as Nightmare Moon means for her beliefs about Discord.
"Three's A Crowd" endcap. Why *did* Discord want Twilight to go to the ends of Equestria for him?
A goose waddles out of the Everfree to torment Ponyville.
Discord dies. He gets better.
Fluttershy has a nightmare.
Discord takes Fluttershy to see rain made out of light.
Celestia and Discord, as teens, flee through space to a new world promised by a letter from Luna.
Episode tag/companion to "Discordant Harmony".
Shortly post-reform Discord has conversations with several of the Mane 6, and others. They do not necessarily go all that well.
Twilight could possibly have forgiven the thief for stealing books from the library. But when she finds food stains all over a few the thief returned... oh, now it is on.
A dragon who is not really a dragon turns up in Celestia's bedroom to give her unsolicited advice regarding Discord.
Three Equestrians wander Earth, the low-magic planet of humans, in search of the portal home. Expansion of "Ice".
Q's days of making overconfident, stupid mistakes come to a middle. TNG crossover, Discord is Q.
Twilight Sparkle, element of Magic and Order, reports to Princess Celestia on her findings regarding the apparent re-emergence of Discord.