2d side-scrolling battle background, pure environment only, absolutely no people, no silhouettes, no body parts. night, cold and oppressive atmosphere, monochrome color palette (black, white, dark grey). wide flat ground occupying 80% of the frame, empty. in the air, only sharp wavy silver sword slash trails and floating black bandages. black and white striped cloth hanging on a wooden pole in the far background. flat cel-shaded anime style, thick black outlines, no shadows, 2:1 aspect ratio,