I would print the entire blockhead with normal plastic. However, inside of the blockhead, I'd rig up the 3d printer to print 3 cubes of magnesium diboride, 1 in both 'feet' and 1 in the pants. Then, I'd sink all the parts of the blockhead in liquid nitrogen until the magnesium diboride passes its superconducting phase transition point, so that the torso of the blockhead just sorta floats above the feet like magic.