An exotic Cerean weapon, used primarily by the monks of the Cerean Zwei-do order. Although the Zwei-do monks have balanced their mastery of martial arts along with their mastery of the Zwei, over the course of their studies they have also created non-technological weapons, incorporating them into their martial arts forms. Their primary weapon is the deadly katana, an exceptionally delicate Cerean blade made of a durable rare alloy which can only be found in the Aryx mountain range. The blade itself is very fine, yet possesses a keenly sharp edge. The katana is considered an exotic weapon (requiring the exotic weapons — katana feat), and can threaten a critical hit on a natural roll of 19–20. The use of the katana outside of the Zwei-do order is extremely rare, but not unheard of.