Tomás Hijo makes linoleum block prints in a medieval style that is well-suited to Tolkein, Lovecraft and other fantasy writers' works. Check out his Nictonomicon bestiary project Kickstarter for more details.
Here's one he did previously called The Madness of Denethor.
Hurry, though. The Kickstarter ends soon.
• NICTONOMICON Bestiario sobre Lovecraft / Lovecraft bestiary (via Propnomicon)