In Tournament
Modern tournament rules for most trading card games allow the use of card sleeves, and consider the card sleeves (if opaque) to be the real "back" of the card for the purposes of marking.
Read more about this topic: Card Sleeve
In Tournament
Modern tournament rules for most trading card games allow the use of card sleeves, and consider the card sleeves (if opaque) to be the real "back" of the card for the purposes of marking.
Read more about this topic: Card Sleeve