Free to play, but clearly pay to win. Sucks the fun out of it. Top players in museum of honor, so pay to get there first gets honored. Frustrating to advance. Energy recovery is too slow. Repeated grind to level team. Graphics and gameplay are really good. Summoning heroes so far seems more fair than other games like this. It's just the pay wall hit so hard so fast and rewards those who pay that I can't give it more than one star.