Decktet" which was invented by P.D. Magnus. It's an unusal deck of cards, not only does it have a great art but each card may have more than one suit! There are any number of games that can be played with the Decktet, one of which is called "Adaman". Adaman was likewise invented by P.D. Magnus.
It's a challenging solo game and peaked my interest enough for me to create a version of it you can play in your browser.
If you want to try it out CLICK HERE