Promoting a player deck will increase additional attributes. Promote a deck by recruiting and completing each player on a specific deck. Follow these steps to promote a deck

1. Tap on [Player Deck] from the Main lobby.

 

 2. Choose which deck you wish to promote and make sure to collect all specific players.  Tap on the [Promote 4/4] button.

  

3. Promote your deck by tapping on the [Promote Deck]button to add attributes to the deck. The deck will be promoted to another rank with better attributes.