https://twitter.com/marble_cards/status/1023917436800778242?s=12

MarbleCards@Marble_cards
Did you get one of these at @nifty_hacks? Keep it! It will soon unlock a #NFT part of MarbleCards genesis story.
#nifty https://pbs.twimg.com/media/DjWvdOuXgAAmAPX.jpg