He managed to drained the chakra to open the box. To the surprise of the four council members of the prison castle, his wish upon opening the box was to bring back Muku. Being corrupted by the box Muku, pierced his arm through Mui's chest rendering Mui almost lifeless. Muku transformed into Satori, a bird-like monster. Mui regained some strength, Satori being kept busy by Naruto. Mui sealed Satori with his Fire Released: Great Fire Heavenly Prison jutsu. Muku gained momentary control of Satori, seemingly turning back to normal. Muku used Fire Release: Demon Lantern to trigger the Heavenly Prison jutsu, killing himself before Satori regain control. Satori was returned to the box and the Box of Ultimate Bliss was put away in the whirlpools outside Hozukijo, never to be used again. Mui died together with his son, Muku.