Quick Ears
The Battle of Carn Dûm #123 (x3)

Response: Exhaust a DĂșnedain or Ranger hero to cancel an enemy card just revealed from the encounter deck. Then, shuffle it back into the encounter deck and reveal an additional encounter card.

"... though I cannot disappear, I have hunted many wild and wary things and I can usually avoid being seen, if I wish."
–Aragorn, The Fellowship of the Ring