This game is pretty good for a mobile game but for a F2P player, it's impossible to get anywhere with the events and the Cash shop is horrible. The CS in this game is unfair for the amount of money you put into it.
http://feedback.mobage.com/forums/194402-fantasica-/suggestions/3738860-make-it-possible-for-non-paying-players-to-achieve
http://feedback.mobage.com/forums/194402-fantasica-/suggestions/3754692-rates-for-5-and-6-cards-too-low-in-cash-shop-