Cards and Castles by Thousand Eye is an interesting mobile game that combines traditional trading card dynamics with general grid-based strategy. Interested yet? Cards and Castles does provide a rather unique spin on two different strategy genre dynamics and comes out on top.
As in a normal trading card game in Cards and Castles you first build up a deck. There are tons of cards to earn/get and you can even combine them to form bigger and better ones as the game progresses along. From there you meet your opponents head on in a grid-based battlefield where you better have your strategy hat on. Again, there are tons of different units which really keep the game interesting and fun and gives great variety in your deck building process. Cards and Castles is free and for that price you might as well check it out!