Stefan Koidl is a freelance illustrator, concept designer, digital painter and committed Krampus mask carver living in Austria. He has worked for Dark Horse Comics, Rhino Games, Ravensburger and more. In 2021, his first book, The Art Of Stefan Koidl, was successfully crowdfunded; extending the engagement with his audience, it included stories written by members of his fanbase, inspired by Koidl's art.