Worthless Game. Not worth spending any dime due to disappointing summons and can't upgrade any characters further. Too many overpowered stages too that made me bored for days then becoming weeks. Events are lame and boring as hell and while Server is becoming half dead or no longer active in weeks. Game is only fun at start in new server but already boring in old server as I reached higher levels because can't progress anymore because there is nothing new or interesting to keep playing.