A series of these weapons were constructed for the defense of the library fortress of Candlekeep some 200 years ago. The keep had acquired a tome detailing the imprisonment of the pit fiend Aegatohl, and a score of malevolent creatures came to claim it. A small horde was held at bay by the Knights of the Mailed Fist, along with the unexpected assistance of Devon's Privateers, a group of pirates. The tome was later destroyed.