I do enjoy Shadow Era, and Hothead's Kard Combat is excellent as well, but my new favorite collectible card game on the App Store is Ascension, based on the real-life title by Gary Games. There's a lot of similarities to the great card game Dominion, in that you build a deck up as you play the game, rather than having to rely on a pre-built deck. As you add new summons to your deck and "slay" monsters, you earn honor from a limited pool, eventually trying to fini