After making a terrible mistake with time travel, Twilight Sparkle begins to fade from existence, but not before using the opportunity to advance the cause of science.
Rainbow Dash follows a sky-splitting star to the ground, carrying a single magic-slinging occupant. With no way to communicate with the alien, they must rely on bonds stronger than words if they're to avoid a determined pegasus general.
Trixie's line of work is dangerous. But she's a careful showpony, and that's why she's only died a few dozen times in her career. She thinks this is normal.
One of Discord's pranks leaves Celestia with a simpler state of mind. Desperate to fix his mistake, he enlists the help of Twilight and Fluttershy to undo the damage before anyone else, especially Luna, finds out.
My name is Twilight Sparkle. One year ago, I summoned a being into our universe. Ruined civilizations call him the Bringer of Sorrows, The King of Flayed Souls, He-Who-Came-From-the-Darkness. One year ago, I summoned Johnny Test.
Some sheriffs are celebrated in ballads; others have their names whispered by bandits as wretched curses across the desert winds and even more are remembered for the injustices they fought. This one belches fire.
After an accident, Rarity and Twilight are thrown in a race against time to stop their transformation into changelings before they become part of Chrysalis' swarm forever.