Here are playing card back designs from Joshua M. Smith, the Designer of the Altruism Playing Card Deck for The Blue Crown, found on his Behance account:
Here is more work from Joshua M. Smith on Behance.net
Here are playing card back designs from Joshua M. Smith, the Designer of the Altruism Playing Card Deck for The Blue Crown, found on his Behance account:
Here is more work from Joshua M. Smith on Behance.net