The Yin Release: Winged Soul Technique (陰遁・翼霊の術, Inton: Yokurei no Jutsu) is a technique exclusively practiced by Azusa Uchiha. An expression of her unique talents in the manipulation of spiritual energy, Azusa taps into her imagination and governs it to form the shape of butterflies. These butterflies, being formed out of her own chakra, are completely under her own will. They begin as completely black constructs with a complete dependence on Azusa, but may be advanced into a new state of being. These are the butterflies used by Azusa in order to reconnaissance around areas of interest.