The Alicorn Curse

Luna skipped along the floors of Canterlot Castle. She was in a good mood, and nothing could get her down today! She knocked on Celestia's door.

"Tia?" she called, knocking again.

"I'm coming!" the sister replied. The door opened to Celestia's room.

"Tia, have you seen my left fore-shoe?" Luna inquired.

"No, I haven't seen mine either. It's quite peculiar." Celestia replied.

Luna blinked in confusion, but shaked the thought out her head. "Nevermind then. We musn't miss the train! It will arrive at the station soon!"

Celestia nodded in agreement and set off to the station with her sister.

After jumping off the train, which they nearly missed due to being distracted by ice cream, the two alicorns entered Ponyville, smiling at all the ponies. They approached a large castle which housed Celestia's former student, Twilight Sparkle. And that was just who jumped out to meet their fellow princesses, along with Princess Cadance.

The four princesses had planned a day out, visiting all the various tourist attractions and monuments. They set off, sharing recent events and happenings in their lives and sharing thoughts. It was going perfectly.

Perfect wasn't in Twilight Sparkle's dictionary.

"And I told the shopkeeper-"

A royal guard ran to the princesses, obviously in fear. The princesses tilted their heads, as if to ask the guard what he wanted to tell them.

"Your majesties," the guard began, "We have detected large amounts of magical power coming from different locations in Equestria."

"...and?" Princess Cadance prompted.

"They all seem to be travelling towards you."