Unknown Swallowtail Butterfly

Nue Houjuu's Focus Shot (a Touhou LW original). In this attack, she uses her odd red wings. It is not known why these wings are so strangely shaped, but they resemble arrow feathers as well as a swallowtail butterfly crest. The Raishoudou bow and the two arrows, Suiha and Hyouha, used to defeat the nue, are said to have been handed down from Minamoto no Yorimitsu to Yorimasa. Shoukajo, the daughter of Yuuki You (a master of archery in China), gave Yorimitsu the bow and the two arrows in a dream. The Raishoudou is said to be a bow made by Manjushri with the corpse of a monstrous snake from Mount Wutai. Suiha and Hyouha are sacred arrows refined by the two eyes of Manjushri and fletched with black heron and mountain bird feathers, respectively. With such immense spiritual power, they were finally able to defeat the nue's unidentifiable nature.