The original sketch was created by Brandon Sanderson as part of the Halloween Livestream (which you can find on his Youtube channel).
As part of the artist livestream event at Nexus, an artist took one of Brandon's sketches and brought it to life. You can also find the artist livestream on Brandon's Youtube channel.
This piece of artwork will be signed by both Brandon Sanderson and Kaitlund Zupanic. Additional details and studio photos will be added early next week.
