In the Shadows
The Land of Shadow#12 (x3)
Event
[3]

Lower the cost to play In the Shadows by 1 for each Hobbit or Ranger hero you control.

Combat Action: Each enemy engaged with you with engagement cost higher than your threat gets -1 and -1 until the end of the phase.

He could see them stealing up the slopes, singly or in long files, keeping always to the shade of grove or thicket... –The Two Towers