A clan of svirfneblin deep within the Underdark created the Hammers of the Wisp to guard against vicious drow hunting parties. They hoped to model an item that could erupt with light, slowing or repelling their enemy. They were initially successful, and a dark elf group broke ranks the first time the weapons were used. No record of the deep gnome clan exists after that, however, and it is unlikely they survived the drow reprisal.