You will recieve 'draft picks' after Quick Game mode victories, at the end of a Blacktop Challenge, and after an event win. The 'draft pick' feature allow you to keep picking cards from a face-down selection, until you run out of selections or hit a rare or better card, at which point the board will reset. At the top of the draft board is a meter indicating what the best possible tier of cards is you will be able to receive. As your team improves so will the draft board.