Ultra-realistic full-body portrait of a samurai warrior, draped in intricate black and gold armor with a prominent yellow war flag banner. The scene is illuminated with cinematic lighting, capturing vibrant, high-definition details that make the armor glisten. Set in a dramatic, reddish, war-torn landscape filled with swirling smoke and glowing embers, the environment adds depth and intensity. Enhanced with lumen reflections, the scene features a focused depth of field, reminiscent of an Unreal Engine 5 rendering. The striking atmosphere is reminiscent of a trending ArtStation piece, with heightened realism and hyper-detailed textures, all within a 9:16 aspect ratio.