Master Chief, Halo series, power pose, green armor, reflective visor, battle rifle, sci-fi, muscular build, standing, futuristic cityscape background, alien structures, distant explosions, dynamic lighting, action-packed, high-detail armor texture, metallic finish, 3/4 view, dramatic angle, intense atmosphere, cinematic composition, cool color palette, dusk lighting, energy shield glow, cybernetic enhancements, space marine.