Waste of time, I have been playing this game for a while, many thing not working properly, after an update, I lost all the normal chest and back to 0. Some heros don't receive level updates anymore. Auto battle limited to 20. Nned to spend much time to get coins to upgrade the troops. And NOW, you can't upgrade troops to levels beyond 8 without 2500 sheild. If I knew this from the beginning I wouldn't play this game.