Twilight sighed as she closed another book. This one hadn't been particularly interesting. Celestia had been sending her an unusual amount of books lately, causing her to spend days by herself reading. Spellbooks were piled up around her, each one begging to be opened.
She picked up a particularly dusty book, and her eyes widening just a little at how old this book was. It's brown cover was faded and tarnished, some pages were ripped out and stained, and the spine was falling apart. The older books always intrigued Twilight more because who knew what they could hold? Who knew what could be in a book that every pony else had forgotten? This particular book had a brown cover, and in silver calligraphy was the title: Spells of Another Dimension
The lavender unicorn flipped through the book, there were hundreds of spells, some of them not even in Equestrian. Twilight deemed most of them unfit to cast without the Princess around, so she thought it was going to be a book she would have to put aside.
Until she found an interesting-yet harmless-spell. The title alone piqued her curiosity because it had no description to say what it did, just instructions and the title Meet Another You.
Meet another you? What could that mean? Twilight's interest in magic got the better of her, and she decided to go ahead and cast the spell, deciding that Meeting Another You couldn't cause any harm.
Twilight's horn began to take on it's signature purple glow, and she began to cast the spell. As the magic flowed through her, a swirling vortex began to form on the floor in front of her. It pulsated, changing colors from purple, to an almost black color. The vortex convulsed one more time, and a mare was spat out.
Twilight stepped back in shock, unable to comprehend what she was seeing.In front of her stood another Twilight, but the similarities stopped there. This Twilight had a dark purple, almost grey coat, with a ragged, dirty mane. She looked darker, meaner, and ever so slightly confused.
The other Twilight straightened up and scowled "Where am I?"
Twilight snapped out of her shock "WHO ARE YOU!?!? HOW ARE YOU ME-HOW IS THIS EVEN POSSIBLE???"
The other Twilight sighed, beginning to look bored, "I asked a question."
"Well, Twilight-"
"I go by Twi"
"Ok, Twi, You're in Equestria, but based on the spell I cast, you're in a different dimension."
Twi nodded in understanding, "I'll say, I was waging war one moment, and now I'm here. What am I supposed to do to get back?"
Twilight's eyes got even wider "W-w-w-w-wait, what do you mean waging war?"
"The war to take over Equestria."
"Fighting against who?"
"Celestia and Luna of course. Do they not rule here too?"
"Well, they do, but-but why are you taking over?"
"Because I want to rule Equestria. Are you the stupid version of me, or have you never dealt with dimension travel before?"
"No, I can't say I have ever dealt with dimensions very much."
"Oh, that explains it."
Twi gave Twilight a smile. All scariness aside, Twilight could almost believe it was genuinely friendly. "I promise I won't try to pull anything, so do you want to go talk somewhere? I'm curious to know what goes on in this," she waved her hoof to indicate everything, "peculiar dimension of yours.
Twilight returned the smile. I can finally learn about what other worlds are like! "Sure, there's a place on Sugarcube Corner where we can talk."
As Twi followed Twilight out the door of her library, Twilight never noticed the real, evil grin on Twi's face. This is going to be easier than I thought.