(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.)
(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.)