Try to collect the most powerful cards by trading with your friends!
To trade treasure cards with a friend, first off make sure that you are standing very close to your trading partner. Then open your Friends List and search for the person with whom you want to trade. Click on that person and then click on trade.
A screen will open (like the one to the left) that allows you to place whichever cards you want to from your section called ‘My Stuff’. When you click on one of your cards in ‘My Stuff’ it is transferred over to the left side of the screen. Once you and your friend agree on the trade, click Trade and the cards will automatically be transferred to the other player. Note that you may only trade treasure cards, and not robes or wands or anything else.