PHANTASM III has the most elaborate sphere action sequences as any in the series. D. Kerry Prior, who so ably created the ear-cutting sphere in PHANTASM II, was enlisted to literally go “balls to the wall” on the second sequel. In addition to creating the nefarious “Eyeball sphere”, he was also required to construct a “Brain sphere”, a triple-bladed Gold sphere and the first ever character in a sphere … the black “Jsphere” or “Jody sphere.”
Source: http://phantasm.com/index.php?option=com_content&task=view&id=59&Itemid=88888907