All of Twilight's friends had swapped Cutie Marks, somehow. Rainbow Dash had Fluttershy's, Rarity had Rainbow's, Applejack had Rarity's, Pinkie had Applejack's, and Fluttershy had Pinkie's. This was the effect of the spell Twilight had cast on the Elements the night before, and it was tearing her friends apart.

So, Twilight tried, and succeeded, to fix their marks. In doing so, she was struck with inspiration, and finished the incomplete spell she cast from Starswirl's journal the night before.

In doing so, unknowingly, she proved herself ready for something greater. Celestia called her to a strange, ethereal space full of stars and nebulae. Celestia then began to explain what happened, and started singing a song for Twilight.

But something was wrong with the song, and things escalated from there.

Overall, Discord was not happy with the result.

An odd idea I had while trying to get myself to start writing again. I figured a one shot would do the trick.

Set after the whole Tirek incident.