My Little Demon Slayer (MLP×KNY Crossover fic)

⋆｡‧˚ʚ Prologue ɞ˚‧｡⋆

As Starlight walks around Ponyvile, thoughts about her previous adventure in the human world course through her head. If somepony could make a mirror to travel to another universe with, then surely I could make a spell that would demonstrate to be more efficient than having to rely on a mirror.

The idea struck Starlight. Maybe she should make a spell for traveling to other universes. After all, a spell like that is sure to prove useful to her mentor, Twilight. She teleports herself back to Twilight's castle, and searches for books relating to interdimensional travel. She spends hours looking, until finally she finds the information she needs.

"String theory suggests that we can define our reality with eleven dimensions where some dimensions fold onto themselves. The first three spacial dimensions exist mostly confined and shaped by gravity, time however is confined by a cone defined by the speed of light limit." (A/N: I found that info on Quora)

"If some dimensions really do fold onto themselves, then casting a spell to travel to another universe would have to be done with pristine. If not careful, somepony could end up going to some undesired world," Starlight murmurs to herself.

While all of that was happening, Rainbow Dash, Pinkie, and Fluttershy are looking for Twilight. She was supposed to meet up with them at Sugar Cube Corner today, but hadn't shown up. "That egghead probably got caught up on some book again. Let's check her library, she may be there," Dash says.

The trio make there way to the library. They open the overly sized doors, when suddenly they get hit with a bright light.

"Oh no, what have I done?" Starlight was in a panic, for instead of transporting the object she had chosen for the job, she now had sent her friend's to Celestia knows where!

...

Dash, Pinkie, and Fluttershy groggly open there eyes. Something didn't feel right. They sit up and inspect themselves. "What the hay?"