Warhammer 40K Darktide character, Space Marine, power armor, chainsword, bolt pistol, grim expression, standing, battle stance, futuristic gothic cityscape, towering spires, smog, battlefield, scattered debris, firefights, distant explosions, dramatic lighting, overcast sky, dynamic angle, action-packed scene, metallic textures, worn surfaces, energy shields, muzzle flash, 3/4 view, high contrast, detailed armor engravings, skulls, imperial iconography, coiled power cables, servo-skulls, atmospheric perspective, science fiction.