Swedish black metal band Watain hired New York-based design/printing company Metastazis (who has done work for Nachtmystium, Antaeus and Averse Sefira, among others) to print gig posters for a London show, and the posters were done in human blood. The blood came from the designer and from an unnamed Watain fan. 111 copies of the poster were made, to be sold exclusively at the performance. You can read more about the process and see pictures at Metastazis’s blog, here and here.
Here’s what the poster looks like:
