The Enemy's Trail
The Hunt for Gollum Nightmare #7 (x2)
Perfidia

When Revealed: Search the encounter discard pile for a Clue card and attach it to a Mordor enemy in play, if able. If no card is attached by this effect, The Enemy's Trail gains surge.

Shadow: Search the encounter discard pile for a Clue card and attach it to a Mordor enemy in play, if able.