Okay here is the deal, It is really fun at the beginning I admit, but whenever you pass the first chapter the game becomes PAY TO WIN. For example upgrade cost of a card 28600 coins but the coin drop rate per level is around 100-150 coins. In chapter 2 almost every battle becomes a boss battle and it's literally impossible to pass them without spending money or playing the old levels over and over and over again...
 "Soul Reapers"){kind=icon}
 "The King of Towers"){kind=icon}
 "Ink Battle"){kind=icon}