fine ink technical sketch linework, sci-fi reaper class mecha, death robot, partially colored in chrome silver, iridescent blue, pale aqua, and black, serpentine low-profile form, segmented mirrored plating reflecting light, data-spike modules etched into flank ridges, wedge-shaped head with recessed sensor nodes, no visible eyes, multiple fine limbs tapering to hair-thin tarsi, white background, solo, simple background, sitting on debris, tight watercolor base with slick metallic floorplate, pale smudges and micro-particles, technological ghosting, clean clinical stealth form, masterpiece, high quality, sinister death machine