Index -> Interface -> Casual Lobby -> Joining a Match

Player-created matches show up as Match Medallions in the main area of the Casual Lobby. At the right of the Medallion, you'll see the number of players in the match. Another number will appear below this if the match has observers.

To join a match, simply click the Play button on a Game Medallion that has at least one open slot. This will bring up the Join Match dialog box.

Select which deck you'd like to use for the match. The Deck Selection defaults to the last deck you used. Enter a password if required. Once you have made your selection, click the Join button.

Quick Join

You can quickly enter a game by clicking the Quick Join button in the Casual Games Lobby. Right-clicking this button allows you to create Quick Join Settings for the kind of game you want to play. Left-click Quick Join to use this feature with your settings. If a game in the lobby matches your settings, you'll join that game; otherwise, a game will be created using your settings.