The Nightmare Beast is a FOE that only makes an appearance in the quest 'Ivory Princess' Dream II' in Etrian Odyssey Untold: The Millennium Girl. It can be found on the first floor of the first stratum, the Emerald Grove. The Nightmare Beast will appear with four Cutter along with it, but they will not be a problem at this point in the game. Although the Nightmare Beast looks identical in appearance to the Redclaw, its power level is around that of a Desouler and should not be underestimated.