I spend 30$ a week on this game NO MORE. They have changed the algorithms on the skills chance to the point that you have to play the same dungeon 30 to 50 times just to get a chance of good skills just to beat it. Doesn't matter what your rune drop rate says. Game has become all about MONEY for the devs. This game used to be player friendly, and you can forget about building the top char. Hero shards are almost always low tier drops. It will take you years to get the top heros to 7 stars.