Yin Release: Insanity Scythe Technique

Mind Jack: Insanity Scythe (狂気大鎌の術）, Kyōki Ogama no Jutsu) by utilizing the Yin-Yang Release Ruka conjures a giant crystallization of Yin Release, given form in the shape of a scythe through Yang Release. The scythe itself is very fragile and does not physically harm anything, when shattered, it releases a wave of yin chakra which causes an hallucinatory genjutsu, of Ruka's choosing, utilizing the time that they are trapped to defeat them. Apparently, Ruka can also imbue pre-existing weapons, like a knife, with this ability.