Mirrors

Twilight read over the scroll in disbelief.

Surely there was no way a pony could disappear for five days, only to reappear perfectly fine and healthy.

This was her job however, any arcane mystery that Celestia didn't have time for, was given to Twilight.

"This is the third time this week something like this has happened." she said to herself.

She began to trot to one of the houses in Ponyville to interview the disappearing and reappearing pony. Not only has the pony vanished into thin air, but has also given descriptions about an alternate Equestria. This story could not, under any circumstances be told to any other pony. It would cause panic and rioting.

Twilight finally found the house and knocked on the door.

A younger mare opened the door.

"Oh, you must be Twilight." the mare said, "Please come in."

Twilight stepped into the house, it was nice and cool inside.

"Thank you miss...?" Twilight said.

"Oh, Sunbeam, my name is Sunbeam." the mare said.

"My husband's name is Wavelength." Sunbeam said, hes in the living room.

Twilight trotted over and found Wavelength, he was sitting and looking down at the floor.

She sat down, "Hello Wavelength, my name is-"

"Twilight I know." he said, "You told me yourself.".

"But, I don't recall that we've met before." Twilight said.

Wavelength looked up at her, "I didn't meet you, in a sense, I met a different you.".

"Explain please." Twilight asked.

"The alternate Equestria? Alright, but I hope you have a quill handy, this will be a lot to take in. The other Equestria is the exact opposite of this one, everypony acts differently than they should, for example, the princess? She killed Luna instead of banishing her, she did the same with others whose names I do not know. She was not a very friendly person, until you killed her."

Twilight was shocked, "I did what?" she asked.

"Well, you overthrew her, from what I was told, you took control of everything, but it wasn't enough, you wanted control of another land. More territory, more slaves. You found out how to use mirrors as gateways between the two universes, and thus, my darker version pulled me in, and spat me out. I don't know what he did to me, but I feel strange, I feel like a different pony."

Twilight was dumbstruck, that detail, that description, frightened her. It seemed like it could very well be true.

"Thank you for your time Wavelength." Twilight said, "If anything else happens, contact us."

Wavelength nodded.

Twilight began to walk back to her library. Why would she want to overthrow the princess? Why did this alternate Equestria exist? These questions were too much to take in at once. She had to get back to the library so that she could begin researching the subject. She needed to contact the princess too, and she had to do it quickly. The sooner she got to the bottom of this, the better.