Wonderment

"Luna! Are you alright?" Celestia said worriedly to her sister, who laid sprawled on the ground.

"I-I think so, I thought I just heard a shadow speak!" Luna nervously giggled.

"Well that's just ridiculous, shadows can't speak," Celestia stated firmly.

"I can't believe you can hear me!" Squeaked a filly-sized shadow in the corner. Luna jumped at the noise, but Celestia acted like she didn't hear her. "You! The blue one! You look really familiar, but I can't put my hoof on it." The shadow giggled.

"Sister, I think that I might have created the Pony of Shadows!" Luna's worried voice echoed throughout the castle.

"No you didn't, me and Shadow are the Pony of Shadow's daughters!"

"What?" Luna's left eye twitched, "So you mean there are three of you here?"

"No, I have no idea where the real Pony of Shadows is!"

"Lulu? Who are you talking to?"

"A shadow that turned into a sentient life being when I was banished,"

Celestia started to laugh at the joke. Luna gave her a deadpan stare.

"Oh, you were being serious."