"Twilight." Celestia smiled. "Rainbow. Fluttershy. ..." She called them all. "A magical cave has just appeared by Ponyville's borders."
"Magical?" Twilight's eyes shined. She wanted to learn how to do that. "Not now," interrupted the Solar Princess, "You'll..." she stopped, trying to find other words to say. Sighing, she revealed, "You'll have to fight." "F-fight?" smiled nervously the Princess of Friendship, "That's not your usual lesson, eheh...". "I know, but there seems to be no way. Now, go." She opened the doors with her magic, and started writing something on pieces of paper.
"This," declared Rainbow Dash, "this is weird." "It is indeed," replied her purple friend, looking at the floor. "A-are you okay Twilight? I really wouldn't want you to feel bad just right now because we have to go and... ". No answer was given.
They all walked to their own houses to pack up things. Spike was off to play with Big Mac, and Twilight didn't bother them. They met under Cloudsdale an hour later, and started walking to the cave. "...I just don't understand! Why would Celestia tell us to- to hurt somepony else?!" "Twi, I'm sure it was just to encourage us to do our best NOT to!"
(WIP. Decided to publish it while still doing it. Tell me what'cha think!)