Annabeth's POV

"HALT!" A girl's voice screamed.

In flew a blur of blue and rainbow, and a blue pegasus who looked in her late teens, early twenties landed in front of us.

"Sandbar, this isn't you," She told Sandbar, getting up in his face. "Who or What are you?"

"Ha, ha," he exclaimed. "The other one is the imposter!"

"Sounds like something an imposter would say!" Percy, er, Sea yelled.

"Woah, woah!" Twilight galloped into the library. "What is going on??"

"This Sandbar is an imposter!" The mare cried out.

"Rainbow, calm down!" Twilight exclaimed. "Let's see," her horn glew pinkish purplish, and a beam of light touched Sandbar.

There was a slight screech, and Sandbar turned into a...mouse.

"That's strange," Twilight mused. "That's the spell to reveal Changlings..."

"But it's a mouse,' Rainbow told her.

"I know."

"I might know," I whispered.

"Spill your secrets, Wise Girl," Sea muttered.

"Can't Changlings turn into any animal or pony?" I asked. Twi nodded. "Then," I continued. "The Changling had about half a milisecond to turn into another animal, in this case, a mouse. To see the Changling, it needs to be knocked unconcious before we do the spell."

"ME!" Amore screamed. "LET ME! LET ME!"

"Uhh..." Twiligt let out.

"Trust me," I told her. "Let Amore do it."

"YES!" Amore (Piper if you for some reason FORGOT) turned to the mouse. "You are verryyy sleepppyyy...and you are now unconcious!"

The mouse fell to the floor, asleep.

"I'll question that later," Twilight chuckled, then preformed the spell again.

This time the mouse turned into a Changling. Then the bell rang.

"Rainbow will bring you four to class," Twilight told us. "I'll take care of it from here."