First of all, you'll get 3 free god damn Yu Gi Oh card! These three cards are just too cool and they are good. (Except for that pink Dragon and maybe the sword) You can have up to 1000 cards in your stock and they are all just great. If you have real Yu-Gi-Oh cards for your own, you might see the codes in very left-bottom corner. These numbers are secret codes, in the game, you can use these codes to have the card which is the card where you pasted the codes. You can duel anyone in the city, also you might want to have a duel with Marik and other rare hunters. Believe me, they are hard!