I 100% adore the Lord of the Rings movies, but the fact is that the Arwen-Is-Dying-Because-Ring-Magic plotline makes zero sense by the lore (if I’m wrong please correct me I’d love to learn). Don’t get me wrong, it works great for the movie, brilliant, in fact, but it doesn’t really make much sense in book logic. Why would Arwen’s fate be tied to the Ring? If she’s mortal now she can’t Fade, and if she’s still Elvish there’s no reason why it should affect her more than anyone else.
BUT, I was watching the extended scene where Aragorn looks into the Palantir and Sauron speaks to him in Black Speech and shows him pictures of a dead Arwen and smashes the Evenstar (Which is a whole other The-Books-Call-Bullshit shebang), and I came up with my own in-universe explanation.
Sauron: *Chilling in Mordor*
An Orc of some kind: My Lord Mairon (Because THAT is what they would call him), the spies have come back from Rivendell.
Sauron: Show me.
Magic Evil Spy: *Shows Sauron the image of a mortal man of the race of Numenor making out with an Elf lady who looks suspiciously familiar…*
Sauron: OH HELL NO!
Evil Spy: Indeed, Master. The Heir of Isildur lives.
Sauron: Get rid of her, now.
Evil Spy: Right away, Mast- her?
Sauron: Yes! Yes yes yes, I don’t care what it takes, get her out of here.
Evil Spy: My Lord, but surely, Isildur’s heir-?
Sauron: Do not harm that man, you hear me? Do not lay a finger on him until she is taken care of.
Evil Spy:
Evil Spy: Are you sure-?
Sauron: Was there a dog?
Spy: A dog, Master?
Sauron: Yes, yes, a dog, a big one.
Spy: Not that I could see, no.
Sauron: Oh well thank Eru for that, at least.
Spy: Are you feeling ill, Master?
Sauron: No, and I’d like to keep it that way. Arwen annihilation is priority number one, ok? And don’t you lay a finger on her man until I say so, got it?
Spy: Alright then…
Sauron, still looking at the image: HE’S GOT THE RING OF FELAGUND!!!
Spy:
Sauron: KILL HER KILL HER KILL HER KILL HER KILL HER RIGHT NOW!