Winning seasons is the most effective way to earn some Super Rare, Ultra Rare, Epic and better cards. Winning is easier if you have your season's tier as close to the upper limit as possible by having a top deck for that season. You will be awarded certain cards by accumulating games played. At 523 games played, you will receive Super Rare Michael Jordan card. At 1023 games played you will get a second Michael Jordan card to turn it into a pro. You can spend credits to purchase a card pack. 1,200 credits are needed for a guaranteed Ultra Rare (with a chance for Epic) card.