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We had done some (decidedly unscientific) testing with it, which we even made mention of in the June 2012 announcement

cards, for the most part, act like Land cards (which provide Mana) in Magic: The Gathering or Ink in Disney Lorcana

Mine was slightly damaged (just a few scratches really), which knocked the price down from $30-something to about $2

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If you had a store where 10 people were playing Standard and you release a bunch of Commander product and 6 new people come and start playing Commander, its not surprising that some of the Standard players might make friends with the Commander players and want to play Commander with them, and that can shrink the Standard audience

Adorable Straw Hat Pirates Standard Size Card Sleeves