 First, there is the Drill System, in which a player drills in certain types of terrain for items and EXP.Second, there is the Card Battling System, which sets two characters against each other in a game of cards, played with card items found by various means during normal gameplay.The game is currently released under all its versions as a free-to-play MMORPG but with a Cash Shop feature, also known in game as MyShop, that allows purchase of in-game items through real cash/credit charging.