(Obviously inspired by the Dresden Files books, though I don't know whether this is already modeled in the RPG based on them.)
Each character or object has a secret True Name - in mechanical terms an Aspect never revealed by name to anyone but the player responsible for it - and a player who figures out a thing's True Name gains a heavy bonus to any attempt to compel any of that character/thing's other Aspects.
Hmm? RPG nerds?
