Yu-Gi-Oh! tournaments have banned unofficial playmats and card sleeves. This is in a bid to make the event appropriate for all ages. ...Which implies a fair amount of players were turning up with ...

yet are otherwise indistinguishable from the previous four categories when sleeved (i.e., put in a plastic sleeve for protection). Finally, if your (Yu-Gi-Oh!) cards are deemed Fair (1.5 ...