No they’re not anything I’ve done, that credit goes to someone on Board Game Geek but they’re pretty cool even if I didn’t have anything to do with them. You can download the PDF’s and print them yourself or there’s a way to get real cards as well and save yourself an ass load of ink costs. Keep reading.
Also I’d get them downloaded if you think you’ll ever have any desire to have them before someone at WOTC decides to send out C&D letters on them even if they’re original work since they mimic official material so closely in look and feel.
It’s two sets of cards that you can have professionally printed out (albeit in hong kong) for use in your Castle Ravenloft The Board Game games. It includes monsters, encounters, magic items.
I’ve ordered one of each of the decks, once they come in, ETA is about 2 weeks, I’ll let you know about the quality but others have already ordered them and had very good things to say about them.
I don’t know if the author gets anything from it or not but if you browse for coupons you can get them for about $10 each shipped, less if you catch a good coupon, some people have gotten them for under $5 shipped. Even at $10 they seem a reasonable value to me. YMMV as always.