grim-dark Warhammer 40k scenery, Imperial Fists temple, ruined gothic architecture, crumbling stone walls, ornate statues of Imperium heroes, dimly lit by flickering torches, misty atmosphere, eerie fog rolling in, dark muddy ground, scattered skulls and bones, rusted chains, worn-out armor plates, abandoned bolters and lasguns, ominous red glow emanating from mysterious artifacts, heavy shadows, cinematic composition, high contrast lighting, gritty texture, detailed battle damage.