"It's not much of a weapon, but it is still a fabled item."
— Weapon Gallery description.
A tool for writing letters with ink. Among members of the Chai Family in China, well known for the number of successful military men it has produced, there is a story of a Chai ancestor that once fought off an assassin with a brush such as this one. It's not really a weapon, but perhaps that will cause opponents to let down their guard.