This gray potion is constantly swirling in bizarre and unusual fractals, all in differing shades of gray. When you drink this potion, you gain the ability to see mechanical objects and constructs such as hidden levers, passages, or traps embedded within a wall. These objects release a visible glow, indicating where the mechanical aspects of such objects are, such as the gears and pulleys. The glow can penetrate 1 foot of stone, 1 inch of common metal, or up to 3 feet of wood or dirt. Thicker substances block the glow, as does a thin sheet of lead. This effect lasts for 1 hour.