Princess Mishap

It was a sunny day in Ponyville. The ponies were having fun.

Princess Celestia was doing a research in the library of the Castle of the Two Sisters. She always kept a book there. A family book. It was named "Royal Alicorn Spells".

This time, she wanted it for a spell.

"Aha!" she said, levitating the book. "Luna will be so shocked to see it!"

She teleported to the Crystal Empire, where the other princess were waiting.

"You found it?" Cadance asked.

"Yes" Celestia grinned. "Now, let's see..." She started browsing through the pages. At page 19, she found a spell named "Body Changing Spell".

"Hey, I found a spell named <>!" the oldest of the four princesses said.

"Um, I think you shouldn't cast it..." Cadance replied, unsure.

But it was too late. Celestia's horn already glowed strongly. It shot beams of light to the princesses. The laser beams changed color: Luna's was dark blue, Cadance's was pink and Twilight's was purple. They began to go to different princesses.

A huge beam of white light emmited.