A deck is the collection of cards you take into battle. It consists of 10 cards and can be found by selecting the Card icon on the bottom left of your screen.
In this 10-Card set, you have 2 tower units, a Hero, and 7 regular units.
You command both a light side and dark side deck, where you can arrange the best cards to take on your enemies!
It is possible to have up to 4 different decks for each side. You can set them up with cards that complement each hero you unlock.
Using cards in a match relies on available energy. Your average energy cost is displayed in the middle of the deck so you can have an idea of how fast you can use your cards in a match.