I used to do all my gaming on psp and ds, and they had some great single player trading card games. Yu Gi Oh, Warhammer TCG, Marvel TCG, they allowed you to play against the AI, and build your decks simply from playing the game. I can't find anything like this on the App Store. They are all free to play, multiplayer games that force you to use continuous IAP to get booster decks. Am I missing a good single player TCG?
Magic 2013, 2014 and now 2015. The games are free to download and then you pay a set fee to unlock the game. You can pay for more decks and a second campaign, but that's completely unnecessary - and it's fantastic.
Good, story-driven single player campaign is hard to find in TCG's. That's why we try to achieve that in our game, Earthcore: Shattered Elements. http://forums.toucharcade.com/showthread.php?t=219488 Check it out, I hope you'll enjoy it.
If you're from Canada, then you can now check Earthcore: Shattered Elements in action. iTunes link: https://itunes.apple.com/ca/app/earthcore-ccg/id912349391
