Here's the answer, first you make the handle of the blade, it can be made on any material that can resist the heat, then make the handle into a shape you do well with, then buy an numen energy amplifier, make sure it's not damaged in any way, then put it into the handle, place it correctly into the blade and then try it out, If you are getting Numen energy shocks after 9 minutes, you made the energy sword wrong and need to do it again