Dark Fantasy Sketch Render

Using the provided rough sketch as the exact pose and composition guide, turn it into a polished dark fantasy action illustration. Preserve the hunched forward sprinting/lunging pose, the skull-like head, the large shoulder armor silhouette, the bent legs, clenched arms, and the sweeping diagonal motion lines from the sketch. Fully render the figure as {argument name="character type" default="an undead armored knight"} in battered blackened steel plate armor with a menacing skull face, glowing violet eyes, and a vicious open-mouthed expression. Transform the sketch’s loose motion strokes into violent streams of {argument name="energy color" default="purple"} shadow-flame and magical aura wrapping around the body and trailing upward behind him like a torn cloak. Add a desolate battlefield environment not present in the sketch: cracked dusty ground, debris, jagged dark spires in the distance, stormy sepia-gray sky, and strong perspective that makes the character rush toward the viewer. Style: high-detail gritty concept art, painterly brushwork, dramatic lighting, heavy contrast, scratched metal texture, dynamic camera angle, cinematic motion blur, dark souls / dark fantasy mood. Keep the image vertical, intense, and centered on the charging figure. Avoid clean cartoon lines, modern objects, text, logos, or extra characters.