Power - Buy your way into the underground room. Now open up the door that leads to the power and turn it on. Now interact with the two computers that are marked on each side of the particle accelerator. Now go to the pack-a-punch machine and go into the Dark Aether. Go up onto the main land and to the tunnel that is marked on your screen. Go through the tunnel and pick up the pack-a-punch part, then run to the pack-a-punch machine and forge it.