Tough to review, easy to recommend.
Your enjoyment of this game will depend on what you are looking for. If its asynchronous multiplayer stick to two player and its a great game. Go above 2 asynchronously and it gets painful fast! There are just too many phases and subdecisions to be made back and forth that you can literally click an opponents avatar to attack only to wait for them to choose what defense to play.
Having said that, if you are looking for single player vs. ai, 2 player asynchronously or if you are going to play live multiplayer with more than 2 its a fantastic game. The chaining of colors/card, the different stages that all have unique feels to them and the great production values(great art/ui etc.) all add up to a solid card style game that is 1 part ascension, 1 part magic the gathering.
Stealthy Monk about
Nightfall, v1.0.2