Chaos Space Marines, traitor legions, Warhammer 40k, power armor, corrupted insignia, mutations, tentacles, grimdark atmosphere, battle-worn, daemon weapons, boltguns, plasma pistols, chainaxes, spiked helmets, glowing eyes, tattered capes, baroque armor, twisted metal, warp energy, desolate battlefield, skulls, fire, brimstone, dark gods banners, 3/4 view, dynamic poses, action scene, harsh lighting, smoke, debris, dystopian landscape, ominous sky, large-scale conflict, detailed textures, metallic reflections.