Yumebakura

Yumebakura is an Ayakashi that exudes a mist to put people in a deep sleep, then enters the dream world so he can eat the dream incarnations of his victims (thereby killing them). However, Shinken Blue and Shinken Green enter the Dream World after him and force the Ayakashi out before breaking his hold over his victims. Yumebakura's method of feeding is the basis of the of Japanese myth.