(Traps can only be played from arsenal.)
Target attack gets -2 [Power] unless the attacking hero pays [1 Resource]. (The attacking hero chooses whether to pay [1 Resource] as Rock Slide Trap resolves.)
Near Mint 1st Edition Normal - $0.50
Lightly Played 1st Edition Normal - $0.42
Moderately Played 1st Edition Normal - $0.35
Heavily Played 1st Edition Normal - $0.30
Damaged 1st Edition Normal - $0.25