SPN3 is the serial number for our third set of original trading cards. The characters come from the fact that these were our first batch of sponsorship characters. So the 54 cards in this set are referred to as “SPN3-01” through “SPN3-54.” Serial numbers are on the back of the cards, in the top-right corner.
Through the Sunstone Games store, of course! SPN3 is being printed in a different way - you can only order full sets, for $35 a set! People with a character in the set have a special opportunity to get 2 additional copies of their card in addition to their order.