Nuclear Furnace

Nuclear Furnace is the 6th boss stage in Touhou 11 - Subterranean Animism, a stage in Touhou Hisoutensoku and an area in Gensokyo Arena. This is where the Utsuho Reiuji (Boss) is located and it is only accessible by Yukari's Gap in the middle of the map every 1 hour in normal conditions. Sometimes when Suika Ibuki uses Massacre on Mount Ooe the victim gets flinged, and can land in the Nuclear Furnace. Another glitch making the Nuclear Furnace accessible without Yukari's gap is when a Hata no Kokoro rides the wheelcart of an Orin who is facing diagonally upwards, making them able to fly using the dash move of Kokoro. Note that Reiuji Utsuho boss will not spawn unless Yukari's gap is there.