Okey so this song is more for the first book focusing on Tamlin and Feyre (I don't ship them at all anymore). I don't know if it fits for Rhysand and Feyre as well since I haven't read the third and last book yet but it probably will so that's good. I don't like Tamlin anymore, but before his change of behavior I did and I think this song kinda fits well with the trials Under the Mountain. Feyre fought for him 'till she died and that's basically what this song is all about. she literally gave her body and soul to save him as the lyrics say. I really hope I can link this song to Feyre and Rhysand when I finish the books 'cause I totally prefer Rhysand over Tamlin.