A special weapon with a sharp curved blade adorning one end of the shaft, and a chain the other, at the end of which is a metal weight. In addition to the large main sickle, a secondary sickle blade is fixed to the opposite end of the shaft. This simple attachment expands the attacking repertoire without forcing extraneous movement. Invented by an unnamed but talented ninja, it is a favoured weapon in the secretive ninja world. In the hands of an expert, Sayoarashi ("Evening Storm ") is said to tear through the darkness like a tempest in the night.