I downloaded this game from an add on another site. I have since been playing for about 2 weeks now and I am hugely addicted. It is a combination of strategy/CCG/board game style game play and the devs have constant events going that really gives you a chance to work cooperatively with hundreds of other players. I urge you to give it a try!
Also, if you give this game a shot use this code aEy2S (capitalization is important) and you get a bunch of free items as well as a rare dragon to give you a boost right out of the gate.