What happens when you overuse medication? Besides the obvious overdose, what happens? The opponent the medicine was fighting grows immune, and this is the case with what happened when you try to treat illnesses with magic for generations? Good job.
Attempting to recreate a long forgotten spell is a dangerous practice, and having an hyperactive pink pony makes your life at stake a dozen times. Twilight Sparkle had ripped a hole in her reality, and it's seemed to have altered someone's universe.
Of course, you know the story of The Unexpected Love Life of Dusk Shine, but this unofficial spin-off follows Twilight: an aromantic, smart-alec, antisocial, bookworm, as she tries to hurdle through the challenges that comes with living in Ponyville.
An impregnation spell allows Twilight and her partner, Trixie, the joy of a baby filly. What they didn't realize was that the spell took the worst qualities of both mares and added them into one spiteful, cocky, and socially awkward filly.