Create a Steelpunk- inspired, hyper- realistic digital art piece featuring a full- body knight holding a shield, accompanied by a marmoset. Incorporate intarsia, tombstones, and fleeing merchants in the background, with a focus on cinematic lighting and an eerie atmosphere. Draw inspiration from the styles of John Blanche, Artgerm, Greg Rutkowski, and Alphonse Mucha. Ensure clean borders, sharp focus, and a dark color scheme. The piece should evoke a sense of unease and foreboding. Utilize Octane Render and aim for an 8k resolution. The final output should be a headshot with an unusual design, suitable for display on Artstation HQ and DeviantArt