An invisible Stand cannot just appear, punch through concrete and vanish without paying a physical bill. To keep conservation of energy and conservation of momentum intact, something in the ordinary world has to supply force, mass and metabolic fuel, even if the punch looks like a ghostly special effect.
One route is hidden machinery inside the user’s body. Muscle tissue, bones and tendons could act like biological exoskeleton actuators, storing elastic energy and releasing it in short, Stand‑shaped bursts. The Stand becomes a projected interface for real limb dynamics, compressing complex biomechanics into a stylized avatar while basic metabolic rate and ATP turnover quietly cap its damage output.
Another route moves the burden into the environment. A Stand that seems to hit from nowhere could redirect ambient momentum, siphoning impulse from air currents, the ground or nearby moving objects, as long as every kick has an opposite recoil somewhere. Quantum entanglement and nonlocal correlations might sync the user’s neural firing with remote impact sites, but they cannot transmit usable work faster than light, so every blow must trace back to a lawful energy account.
Even the iconic intangibility has a possible anchor: the Stand would manipulate interaction cross‑sections, briefly lowering effective collision probabilities for some particles while raising them for others. To the eye it stays invisible; to a target’s rib cage it behaves like a focused storm of high‑momentum contacts that still leaves spacetime, entropy and bookkeeping untouched.
