Though I like where this idea is going, @Dwalus. Geoffers does ask a relevant question.
I love the idea of Stonehearth Merch just as much as the next guy, but it seems like at this point in development there really is no need for a card game, But perhaps somewhere down the road (Beta, Perhaps?) where the game is near complete this idea might be put to action.
Me personally I’m not so sure how well Stonehearth would be reflected in a card game. Now, Action Figures on the other hand seem like they could translate well into the games Voxel Glory if done properly.