This jutsu is Yokosan Clan's jutsu and only used by their members. It only works at Dawn, Dusk or Midnight and at Dawn, Yoake can only use it, Dusk, only Yūyami and Midnight at only Yonaka. At Dawn, Dusk or Midnight and used by the right person at that time, it sends the users opponent into a Genjutsu that is the opponent worst time that they had depending on the time and user.