UPDATE: FEB.26,2022 Deserves a Zero. This App has gotten much worse. The developers have adjusted the A.I. in favor of enemy a.i. always winning. The cascading mana tiles are obvious in favor if enemy. The rates of getting a useful mythic or masterpiece are so low, it is a waste of time and money to chase. What these ignorant developers don't understand is that by making the game more difficult is costing them money daily. Frustrated players now just quit and go play the 100's of other TCG's