Magic: the Gathering Is Turing Complete
TsukiKage writes "A 50-card M:tG combo for four players is demonstrated that is used to construct a simple Turing machine, performing arbitrary computations just by following the rules of Magic and card text thereafter."
That's one of the reasons for the 2 year set rotation. Only the last 2 years worth of cards are allowed in standard play. (There's also the obvious reason of requiring people to buy more cards.) There haven't been any cards with poison counters in at least the last 2 expansions (that's when I started paying attention to the game) and I'm pretty sure there's none in the upcoming one either. The developers try new and different things to try to keep the game fresh and interesting to long time players, and it seems to be hit and miss. I think they've been fairly decent at hitting, but poison counters are a good example of a miss, afaic.
Three days from now?? Thats tomorrow!! ~Peter Griffin