This beautiful piece is by Justin Pfeil. Some of you will already know Justin from his comic series (find it right here: http://thekeepontheborderlands.justinpfeil.com/)
Turns out that Justin and I have been doing very similar things - telling classic DnD stories, using dice to predict outcomes, and then narrating it all as an emergent fiction. The medium is different, but the concept is the same.
Thanks Justin for the wonderful contribution!