@4126
it is part of his formless bones technique, he manipulates bones to get the general shape and probably uses his muscles to further refine the form and mimic physical reactions to motion and etc., he used it (at least) once before, cause I know he did much the same thing when he needed to trap (pun not entirely intended...) one of the higher ups from the evil cult who used a "paired" meditation technique that involved doing xxx stuff to mix "yin" and "yang" energies which if both energies are balanced supposedly helps both parties cultivate faster...or all involved parties, if you have to go with the quality matched by quantity route like he did...(not MC, but the guy MC trap tricked...)