Love the images. Thanks for sharing!
I had a snoop after the artist and there are more in his gallery -- mixed in with other things -- at
http://gerwell.deviantart.com/gallery/
I do like the use of playing cards as a prop, an alternative or complement to the use of dice.
Savage Worlds RPG is the prime example. But it would be distinctly 'metagame' to use playing cards for Middle-earth! Seeing the Valar represented on cards, and perhaps specifically in that artistic style, put me strongly in mind of Zelazny's Princes of Amber...
(Is now the right time to mention the Tarot-like
lassë (Q: 'leaves') card divination system devised or discovered by Martin Baker and discussed here:
http://alt-tolkien.com/r27taratir.html?)
Cheers,
--Os.