I drew it a few weeks ago at an artist trading card get together graciously hosted by Studio Todorovic at Art Central. Originally it was going to be one horse, but I didn't have an eraser, so I thought I would just go ahead and make it two horses in tandem. I used Copic markers for whole card. This line of markers is just wonderful to use, unlike Prismacolors. The nibs are replaceable and they have no odour.
The original card is for sale on Etsy - I do believe it's the first new thing I have listed in a long time!