The drop rates are practically non-existent. You can literally beat a map 100 times and not get a creature. I know because Ive done so, on multiple maps. Its broken. The map where you have to find the tower of chaos does not work. You battle for thirty minutes to get the necessary mana, and then it gives you the wrong piece. It does this every time. Its broken. Naval, fix your 1-star game. Maybe then youll make some money.