Dimensional Key in a Wet Underground Tunnel

Photorealistic cinematic scene of a dimensional key resting on a wet metal grate inside a damp underground subway tunnel. The key is antique brass with ornate engravings; its bow contains a tiny swirling portal that reveals shifting dimensions—galaxies, fractal geometries, and surreal landscapes—glowing in a cool blue-green light. A warm amber flicker from a broken overhead lamp contrasts with the cold concrete walls, exposed pipes, and graffiti. Droplets bead on the key; reflections ripple in a nearby puddle as rusty rails disappear into darkness. Dust motes drift in the beam of light. Shallow depth of field with the key in sharp focus in the foreground and the tunnel receding into shadow, ultra-detailed textures: wet metal, rust, concrete, glassy portal, moisture, grime. Cinematic lighting, photorealism, high resolution.