Do not download if you play for free. Because the campaign is unbelievable. You have 3 awakened heros with 250 level and 1 star, but you must challenge the computer enemy with 5 awaken heroes with level 335 and 4 star. This is ridiculous. They actually expect you to buy anything if you want to higher the level. Not just that, when you try to summon 5 star heroes it cost you 280 diamonds, but in the end you just get a common hero even 10 times. If u play free u just get stuck at low level.