Critical Rolls introduces a variety of new effects to the triumphant natural 20 and the dreaded natural 1, including critical hit effects for GMs and players, critical fails, and a good and bad luck mechanic for criticals rolled in and out of combat. 

This boxed set contains five 60 card tarot-sized decks, including:

Critical Fails
Critical Hits for GMs
Critical Hits for Players
Bad Luck
Good Luck