money greedy game, spend money and get stronger whenever you want, don't spend money you will get older but never be reached that level...now plarius wsays you need stratagy for getting stronger without spending a money but i bet if they themselves knows any free playing strategy to get stronger as compared to those money spenderr... they want money for everything, for eg. they hav reduce mat drops from invaders/shamans so your energy will be get over soon, and you will buy another energy packs.