Portrait of 8k ultra realistic samurai warrior carrying a golden war banner, full body, adorned in intricate black and gold armor with detailed engravings, dramatic cinematic lighting, high definition, vivid highlights, currently trending in digital art circles, hyperrealistic and richly detailed, emphasis on focus and depth, rendered with unreal engine 5, set against a dim, ember-lit war-scarred backdrop with swirling smoke and glowing cinders, cinematic composition in --ar 16:9 aspect ratio.