21.03.2016 13:46
Enter the Team Dungeons trial, form your hero team and join to battle. If your team will win, you can get a Mesa chest with merits and other stuff.
The alternative way is a Hero Expedition. But it requires strong heroes and high level of your Might.
Also, you should log in a game every day to claim rewards. There are bonus cards, tomes of experience, champion essences, and merit packs.