Storm Bottles were small bottles that contained angry fire and air kami, the spirits that make lightning and thunder. They were crafted by the Moshi and the Yoritomo Shugenja, used among the Storm Legion and Mantis leaders as grenades that burst upon impact. Mischievous Yoritomo sailors had been known to give these to unsuspecting targets as a drink, causing damage to the victim. They were originally used as a means of clearing the decks of enemy ships.