The sixth-level body refining technique covered the whole body's muscles, and as the heavy black metal elements continuously fused and were absorbed, the muscle fibers also gained the heaviness characteristic of metal.
Moreover, under the microscopic view of Jack Clark's Divine Soul Intent, some muscle cells underwent changes, frantically absorbing and compressing the heavy metal elements, storing them, and gradually radiating a metallic luster.
When every single cell turned into a black gold color, resembling a metallic 'planet', a faint gravitational magnetic field began to emanate from within the cell.
The change in a single cell was insignificant, but when the black mineral stone in Jack's hand completely turned ashen white, millions of muscle fiber cells in his body had already undergone transformation.
"Not enough yet," Jack suddenly opened his eyes, took out an even larger piece of black mineral stone, and a thought echoed in his mind.