The darkness saps everything the Blight doesn’t steal. It seems only fair that it takes everything she is. After all, she made a promise. She would give anything, do whatever it takes. It’s what had made her so efficient. It’s what had led her to… Shreds of memory are the only thing that remain. It had been important, once, the one thing she held on to in the dark, amid the overwhelming anger, the madness of Blight and ancient wounds still unscarred. The details have gotten lost, all she knows is she can feel it coming. And so she sings.
It takes time to wander the Deep Roads, following a song of madness that only draws you deeper and deeper, time for the Blight to warp who you once were into something much more adept at darkness. By the time you find her, neither of you are what you once were. Once upon a time you would have wept for what she’d become, what you have become, would have taken your sword and honoured your oath. Now all you can do is kneel at her feet, head heavy with a crown of horns, and pledge yourself to your lost Paragon.