Collectable Stat Cards were introduced on December 22, 2011 and are a cross between two existing parts of the game, the Marketplace and Collections. You can buy cards which give attack, defense, health, energy or stamina. You can purchase a Small Pack (1 card for 15File:Icon-gf-coin.gif) or a Large Pack (3 cards for 42File:Icon-gf-coin.gif). When you complete a set you will get a reward card (no skill point stats). It will also unlock a loot drop item that will become available in a certain district. After you complete a set the Reward Card is added to the Reward Series. After completing all the Series (and thus completing the Reward Series) you receive a Mastery Item.