Warning: This story and this description both contain spoilers for the Web Novel: Worm. If you don't want to be spoiled, read Worm first, then come back and read this
The apocalypse had come at the hand of a god-like multidimensional alien entity. Taylor Hebert, a parahuman with power over bugs and bug-like things has her powers altered by a former enemy and subsequently uses morally questionable means to make everyone in existence with superpowers fight this evil deity, eventually defeating him.
This however came with a cost. Her mind was deteriorating as her power was subsuming her. Thus another cape decided it would be a mercy to put a pair of bullets in the back of her skull.
Another entity witnessed all of this. This entity, grateful for Taylor's role in stopping this alien god and thus saving countless worlds and thus countless lives, decides to intervene. It brings Taylor to Equestria turning her into a Changeling Queen in the process.
(Warning, Dark, Death, and/or Tragedy may be added to the list of tags in the future, depending on how things go. Furthermore, the Suicide tag is for the references to suicide in the description and in the first chapter. Suicide and/or self harm will NOT be a major theme in this story.)
(This is a crossover with the web novel called Worm by the author Wildbow. I highly recommend reading it if you haven't, it's a really good story!)