a raging watery horse

A giant horse-shaped wave flushes the orcs away but somehow leaves you unharmed and able to breathe. Even though you don't get it at first, it quickly dawns on you that Arwen Undomiel came to your rescue.

"Lady Arwen", you say as you try to get up and bow, but fail since you are still tied.
"I am grateful for your rescue, but why me? There are more people dying in other places"

Arwen smiles at you: "More people die in other places, but none as valuable to us as you. It is time you are told of the elven gift you carry. But for it to show, you must share with me your body."