Bride of the Dark Lord

Ordinary Elena agrees to a bargain with Damon, a demon from the Abyss, in hopes of helping her boyfriend Arthur rise in the world. The price she pays is far steeper than she imagined, as her own form is traded away in the arrangement. Her happiness with Arthur turns out to rest on a betrayal, and the wound sends her down a path toward payback and a reckoning with the people who wronged her.