Black skin, as if cut from the night sky, covers the arm, but not in a continuous layer- it is torn or translucent in places, exposing the intertwined bone structure beneath. The bones are not human- like: they are curved, as if woven from tentacles, with protruding spikes and asymmetrical joints. Their surface is covered with cracks that ooze a dull glow, Between the bones and beneath the black skin, glowing purple veins pulsate, resembling veins but composed of concentrated energy. They shimmer like unstable plasma, creating patterns like magical runes or electrical circuit diagrams, Pieces of dark metal were embedded in the monster's flesh, as if its limb had been dipped in molten steel and then allowed to solidify. The metal is patinaed, with streaks of rust and flecks of mercury glistening like mercury. It fuses with his body: in some places it forms armored plates, in others it sprouts spikes of bone, and in still others it wires along the purple veins as if conducting their energy