That's when a young, loyal subject steps in. He does the unthinkable, forging a vassal-bond between himself and his lord, giving Elrond the strength to survive.
However, there's reason no-one performs vassal-bonds. Having bound himself in this way, he can never take a mate of his own. He can never tell Elrond of this one-sided bond, for Elrond would feel dreadfully guilty about it, and the vassal-bond demands that he do everything in his power to serve/please the lord to whom he is bound.
What happens when this elf falls in love with another? One whom he must always watch from afar but can never have?
Lots of angst, secrecy, misconstruction and conflict. Bonus points for using a minor character such as Melpomaen, Lindir, Saelbeth or Silinde. Bonus points for a happy ending!