Redhorn Foothills
The Road Darkens#33 (x3/x2)
Location
4 (5)
Hills.  
While Hills of Hollin is the active location, it gains: "Forced: After an enemy is added to the staging area, it gets -5 engagement cost until the end of the round."

Forced: When Redhorn Foothills is explored, each player must discard X cards from his hand at random. X is the number of damage here.