Games Workshop just announced an 18 card set for the Daemon Lores of Nurgle, Tzeentch and Slaanesh (6 cards each)
I guess they'll be doing it for all of the armies to complement the 8th edition WFB Magic cards. They look quite polished.You can get them on advance order from GW now.
http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat1491876&prodId=prod850027a
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