These are a couple of sketches I picked up from eBay. The seller sold about a dozen of these, a couple or three each week. Most of them went for between $10 and $25.
The story behind them is that an artist named Scott Hampton did them as preliminary sketches for the Ultraverse Masterpieces card set. Then Dave Dorman used them as guides for his paintings (every card in the series, including the chase cards, was painted by Dorman).
I asked the artist about it and he said that was how it worked. The seller said he bought them from an artist who had kept them in a drawer for years and didn’t think about them until recently.
Anyway, they look cool. I don’t really know how to describe the art style, it’s grey paper with black and white pastel sketches. Each is a little bigger than a sheet of office paper. And as you can see, Dorman was extremely faithful to the original sketches when he painted. That was a great series of cards.