post-apocalyptic scene, Tsar Fish, Metro Exodus, underwater battle, armored protagonist, harpoon gun, murky waters, decaying structures, submerged ruins, eerie lighting, algae-covered scales, mutated creature, action pose, dynamic composition, high contrast, intense facial expression, survival gear, distressed metal textures, rusted environment, gas mask, tattered clothing, 3/4 view, cinematic shot, desolate atmosphere, radiated water, glowing eyes, monstrous size, submerged metro train, dystopian, ambient light, murky green and brown palette, submerged cityscape.