Treacherous Fog
Core Set#118 (x2)
Treachery

When Revealed: Each location in the staging area gets +1 until the end of the phase. Then, each player with a threat of 35 or higher chooses and discards 1 card from his hand.

"But it will be hard to find the path unless the fog lifts a little later on."
–Aragorn, The Fellowship of the Ring