This game used to be fun, but the developers become more and more greedy everyday. They keep releasing new limited units in order to get people to spend money and then they make an event where it will be impossible to rank up without those new limited units in order to get people to spend money. Every month there is the same cicle of boring events to the point this game feels like work instead of a game... There is so much they can do with this game but for some reason they refuse to be creative