A duel is started by walking into an enemy's area of influence. A duel circle will appear, and the first turn will begin. First, your hand appears on the screen, which is a list of pictures of seven random cards that you currently are able to use from your deck. Next, all the players/enemies pick the card they want to use for this turn. To pick the card you want to play, click on it, and then click on the player or enemy you wish to cast it upon.