This one is pretty simple, each poster names a card and/or strategy from any of the Yu-Gi-Oh! canon (games, manga or anime), and the person below names another that would defeat it. So if I name, say, Dark Magician, the poster below could then say "Blue Eyes White Dragon", and then the next poster would 'play' "Dragon Capture Jar", and so on. Only rule is you can't name cards that aren't permitted in Tournament play, you have to use legal cards and strategies...
So, to start us off, I summon Winged Kuriboh!
So, to start us off, I summon Winged Kuriboh!