Macro close-up of a human heart extracted from chest cavity, transformed into flowing liquid chrome mercury with iridescent oil-on-water rainbow oxidation spreading across arterial walls frozen mid-beat, razor-sharp crystalline veins branching like lightning across molten metallic surface, arterial tubes dripping with suspended copper droplets, deep obsidian void background with scattered ember particles, dramatic volumetric rim lighting carving luminous organic edges from darkness, hyperrealistic 8k render