Chaos is inconsistent by nature... even when it would prefer to be consistent. Discord is afraid that his nature ensures he'll inevitably betray those he cares about again, someday, and he can't figure out how to stop himself. (Spoilers season finale.)
Discord's been settling in, if you can call anything Discord does "settling", to life as Fluttershy's housemate. He's friends now with both Fluttershy and Pinkie Pie, he's become an extraordinarily annoying second mentor for Twilight, he and Celestia are
A myth of ancient Equestria. When the God of Breaking Rules loses his love, a mortal mare, he goes on a quest to break the most sacred rule of the gods, the law of life and death, and return her to the world of the living. Whatever it takes. And it's goi
Twilight's convinced Discord hasn't really reformed, and has found a weapon to replace the Elements -- a reforming spell Discord missed eating. But panicking an entity like Discord is probably never a good idea. And Twilight's about to learn that the good
"Three's A Crowd" endcap. In which Discord hates his life, Cadance is a bit of a troll, and Twilight learns an important lesson about friendship and the concept of negative vs positive attention. Also, a draconequus makes a tolerable kite when necessary.
When the draconequus race left the world, one child was left behind. This is his story, and the story of the filly who loved him, lost him, and was forced to imprison him in stone to save her people. Does not take place in the same universe as the Discor
After the Gala, Fluttershy pulls Discord aside for a talk. Neither of them are too happy about this.
Discord asks Twilight Sparkle to hit him. Twilight does not respond with the expected delight.
Discord takes Fluttershy to see something chaotic he's made that he thinks will be considered harmless and beautiful -- rain made out of light. Fluttershy agrees, but fears that ponies won't accept it anyway. They discuss friendship, and Fluttershy comes
Fluttershy has a nightmare.
As the only stallion to bear an Element of Harmony, Choco Pie, the Element of Laughter, has always felt a bit like the odd one out. But when the crazed spirit of Chaos, Eris, breaks free from her stone prison and starts playing mind games with the Mane 6,
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.
Endcap to "What About Discord?" Twilight confronts Discord as to his true motives for getting her friends to exclude her.
After his betrayal, Discord was sentenced to ten years in stone, with four parole periods a year, on holidays. He was also given a holiday to celebrate Chaos, which is his first parole period of the year. Over the course of a year, the Mane 6 and Discord
Somepony seems to have thought it would help Discord with staying on the straight and narrow if he were required to send Celestia reports on friendship, like Twilight Sparkle does. Somepony was plainly out of their mind.