You see the deck editor screen.
On your right you can see cards you can use to create 
decks. To the left there are cards that are already 
in your deck. A deck must have not less than 30, 
but not more than 50 cards. Each deck has its price,
it depends on the cards in this deck. If you are 
playing in a league, the price of your decks 
must not exceed your mental power.
