Meanwhile, endless light years and several ever expanding universes away, her majesty Princess Celestia entered the lofty demonstration hall in the prostegious Academy of Advanced Magic. A group of judges sat in a row of seats near the front, her sister Luna was among them. "Hello" she greeted them in her usual sweet sounding voice before taking her seat next to her sister.
Luna managed a quick smile before glancing down at a clipboard that she levitated in her blue magic aura. "Ahem, first up for their entry exam, Trixie Lunamoon." She announced loudly. Doors on the other end of the hall burst open and a light blue unicorn mare strode in with a confident smirk plastered in her face. Celestia frowned slightly, she had heard of this unicorn; she was the one who apparently imprisoned all of Ponyville under a dome just over a year ago. The princess was silent and was willing to give her a chance but she wouldn't lie that her hopes weren't too high.
Trixie set up a large mirror in front of the judges, "I the Great an-" she stopped, "I mean I, Trixie, am here today to present a spell of my own creation for you today. It gives anypony the means to turn any mirror into a gateway into another world!"
This got Celestia's attention, mirrors into portals to other dimensions? Such things were mere fantasy, but one novice Mage comes in claiming to have done the impossible, that was interesting indeed. "Please Trixie, demonstrate this to us" she urged her.
Without another word Trixie faced the mirror, her horn built up a brilliant white light before she launched it at the mirror. The effects where....less than desirable. The bolt of magic hit the mirror before refracting off of it and flying right at Luna, before anypony could react Celestia sprung from her seat, putting herself right between Luna and the stray magic blast. That's when it collided with her face.
Everything became a jumbled mess of light and sound before the Alicorn opened her eyes, she looked around to see that the whole room had become frozen in place. 'What just happened?' She thought, trotting in between the unmoving ponies still stuck with shocked expressions on their faces. "At least Luna's ok" she said aloud, looking into her sisters face.
There was a sound if ripping fabric, jarring Celestia from her thoughts. Whirling around she was faced with a black maw of nothingness that dragged her in before she could even let out a cry.