Weapon smithies can make the Nightsister Energy Lance. The schematics and special components for this lance drop off the mobs in the Nightsister Cave. I don't believe there is a quest related to this...just go and kill the mobs. These loot-built lances are very rare, I have yet to hear of one on my server (Corbantis). I've seen pictures (browse the SWG Pikeman forum) of them and they are cool, your whole body is surrounded by electric/lightning-looking stuff when you carry it.