This one I have a little issue with, as I may have said before, as every new game mechanic has a tendency to be proclaimed as revolutionary but there hasn’t been any real revolutions in gaming caused by any of them.
That said, I’m quite interested in the Mayhem deck from Planet Mercenary. They’re cards that add something interesting to the game, bits of story that can make your game better or worse either on a temporary or permanent basis. The game uses a 3d6 mechanic with one die being a different colour – if the odd die is highest, you get a Mayhem card.
Example cards can be found on the Planet Mercenary site, and I really like the ideas behind this game. Playtesting of the Mayhem deck indicates that it works well and encourages story coming from rolls as well as results, so I’m looking forward to getting my hands on it, and trying the mechanic out.
I’ve seen similar mechanics before – the most memorable of which was a storyteller who would draw a tarot card for some rolls and situations and the card drawn would influence how things went.