Lightning Hammer Quest Information:

Thanks to Shar's Page

Lightning Hammer is located near Maeling

This quest is started when you kill a BNR ninja in Maeling -3. There is a man in the center of Maeling Town holding a Lightening Hammer. He will trade it for the BNR. Hold the BNR in your right hand, while standing on the Trader. Click on his name, then on the talk button.

Source: Original mirror