Nightmare Moon is weakened. All it'll take is one final blast of Harmony to purify her. Unfortunately, there's a few too many Elements on hand, most of which are... less than helpful.
Cozy Glow accidentally makes a love potion explode in the lair. Her two villain roommates get caught in the midst of it. It goes as well as you’d expect.
Celestia didn't want this to happen, any of it. Yet Luna is determined to bring the solar alicorn's rule to a swift end. And no matter how desperately she begs and pleas, Celestia can never take back the mistakes she's made.
The mental contest between Chrysalis and Cozy Glow over who would manipulate who has gone on for far too long. Luckily, Chrysalis recently found a foolproof method of finally overcoming the filly's impudence! Surely it won't backfire, right?
Luna has spent untold lifetimes in the dream world with other ponies, and on a cold winter night, she settles in for another- with a colt who has just one hour to live.
Starswirl the Bearded developed a time-travel spell. A pony could use it - but only once, and only be in the past for about a minute. One chance. One minute. That's all Princess Celestia has to save her sister from the Nightmare.