" He steeples his long fingers. “Someday, I will ask your king for a favor.”
“You want me to agree to something without even knowing what it is?” I blurt out.
His stoic face gives little away. “Now we understand each other exactly.”
I nod. What choice do I have? “Something of equal value,” I clarify. “And within our power.”
“This has been a most interesting meeting,” Lord Roiben says with a small, inscrutable smile.
As I stand to leave, Kaye winks an inkdrop eye at me. “Luck, mortal. "
― Holly Black , The Cruel Prince (The Folk of the Air, #1)