Dark Fantasy Knight Sketch Refinement

Using the reference sketch as an exact pose and composition guide, transform the rough doodle into a highly finished dark fantasy action illustration. Preserve the low lunging stance, clenched arms across the torso, massive rounded right pauldron, skull-like head position, and sweeping upward diagonal motion lines from the sketch. Subject: [an undead armored knight] featuring a cracked skull face, glowing [electric violet] eyes, a snarling open jaw, battered black-steel plate armor, heavy rounded pauldrons, gauntlets, greaves, and tattered dark fabric. Effects & Atmosphere: Replace the sketch motion lines with supernatural energy ribbons of black smoke and [electric violet] flames violently erupting upward behind the warrior and wrapping around the torso. Setting: A desolate battlefield wasteland with cracked earth, scattered dust and debris, and towering jagged dark rock spires silhouetted in the distance. Camera & Lighting: Dramatic low-angle perspective, dynamic vertical composition, cinematic high-contrast lighting, intense motion blur accents. Style & Color: Gritty fantasy concept art rendering with rich brush texture, using a focused palette of gunmetal gray, pitch black, earthy dust brown, and vibrant [electric violet] accents.