Alicorn magic is a complex creative force that is almost completely incomprehensible to mortal minds. However, like any magic it is subject to being affected by emotional states. As a result, alicorn souls are prone to occasional ‘fracture’ under extreme emotional stress, creating new beings that embody the emotion that caused the 'fracture’.
We originally were a magical construct of Princess Luna’s, one of the two rulers of Equestria. After We took over her mind to do a few things for her own good, We were banished (along with Luna) for 1000 years. After Our return, We were forcibly stripped from Luna by artefacts known as the Elements of Harmony. Though weakened, We survived, and have been able to recover almost all of Our former power, as well as a body of Our own.
Good. We’ve arranged some things to make your city entirely legal under Equestrian law. In a few days, some of Our servants will install warning signs around your city. Once that’s complete, you may do whatever you like to any pony not bearing Our banner that crosses the signs without any threat of sanction.
These ‘demons’ you speak of… is there anything We can do to aid you against them?
It does not! It sounds like the FEVERED DREAMS OF A MADPONY!!!!
Not true. In fact, We’re older than Molestia by quite a bit. We were banished before the Molestia personality was even a sick gleam in the sun-hag’s eye.
LIES!!!! ALL LIES!!!!!!!!
Why would We ever have sex with a pony who obviously regulates the tabloid industry so poorly that such TERRIBLE and TOTAL LIES could be printed!?
Whoever this ‘mod’ is, he or she is such a liar that We worry that their pants might be on fire AT THIS VERY MINUTE!
Perhaps. Is there something specific you want to know? Explaining it all in general terms will likely take quite a while.
*Apple Bloom is staring at the door with a distant expression*
Hey…
…
…
I’m sorry…
*Apple Bloom suddenly looks at Scootaloo* What’d you say?
I was acting… well, stupid. I should’ve known you wouldn’t betray me. Sorry… and thanks for saving me anyway…
Well… ah’m glad ah could help. *hugs Scootaloo*
And thank you, Nightmare Moon. Wow, I never thought I’d be saying that.
You are most welcome, but thank Applebloom. She’s the one that insisted We help find you. We owe her a great debt for something she did. Well, more specifically, something she did in an alternate future timeline.