Ante cards are cards that the other duelist will take if you lose. If you "bet" a strong card and win, you will win a strong card. For example, a Magician Of Faith may get you a Curiboh. A Blue Eyes may get you a Dark Magician, etc. Save your game before a duel. Then, enter a duel, set your ante card, and if you lose, turn off your Game Boy Advance. Then, go back and try again. Note: Your Domino, duelist level, and your deck capacity will not change if you lose a duel.