In the underground sludge tunnels of New Neon City in the year 2147, damp, chilly fluorescent mist laced with a metallic rust odor seeps into an old gas mask 🥶. Scavenger A-K’s knuckles grip the segmented, non-slip handle of this matte-blue short knife, while the prosthetic interface in his palm snugly slots into the handle’s mounting groove 🔪. The boots of the corporate scavenger reverberate against the overhead pipe walls, and the red dot from the infrared scanner slowly sweeps along the surface 🔴. This is no ordinary toy knife—it’s a prototype A-K salvaged from the wreckage of a crashed corporate test drone. Its 3D-printed filament is infused with stealth nanomaterials, allowing it to completely evade infrared detection 🥷. A-K inches along the wall, his boot soles dragging faintly over the sticky waste adhesive, until the red dot abruptly halts half a meter above his head. He tightens his grip on the handle, and a pale-blue energy stream flows from his prosthetic limb into the blade ✴️, causing the edge to emit an almost imperceptible cold glow. The scavenger’s footsteps gradually fade into the distance, and the white vapor from his breath fogs up the mask as he stares silently at the blue blade, its surface marked by the layering patterns of 3D printing: Should he sell it at the next black-market auction to secure three months’ worth of clean-oxygen quota, or hand it over to the resistance—and risk drawing even more pursuers? The answer lies hidden deep within the foggy underworld 🤷‍♂️🌫️