You need blank cards? Perhaps the cards should be used together with your Heirloom Deck, because the backs are absolutely identical.

You can add your own drawings on the faces. If you would like to get your own ideas printed on them, please contact me.

You get 20 "unprinted" cards with red or blue backs, the backs are marked in a very subtle way from 1 - 10, by turning 10 cards by 180 degrees you really can easily find out which of your 20 cards is selected.