This operation was called [The artificial Pot Kage plan].
Naturally... the artificial Pot Kage wasn't Danzo, but the Fourth Hokage, Minato Namikaze.
Once Minato Namikaze appeared, everything Naruto did from then on would be carried out in the name of Pot Kage Minato Namikaze!
Huh? You didn't believe Minato Namikaze was responsible? Fine... I'll take you into the Sealing Space to see the big fox and the Fourth Hokage. If you still don't believe me, I'll just have to open the gates and unleash the shut-in fox!
The plan began.
Wolffy first left the Sealing Space with the help of Naruto's Shadow Clone, then built the energy limiter in just over two hours.
Once the limiter was activated, a curtain of energy about two meters in diameter quickly surrounded Naruto, who sat cross-legged on the ground.
With everything ready, Naruto prepared to undo the Nine-Tails' seal inside the Sealing Space.
Naruto took the Master Key Wolffy handed him and examined it closely.
The Master Key Wolffy had made looked somewhat like a stamp, and it was simple to use. All he had to do was stamp it onto a lock or seal to open it. It was incredibly convenient.
Kurama let his chakra seep out of the cage, then used it to lift Naruto up.
Once he reached the seal with the sealing tag attached, Naruto pressed the Master Key against the tag.
The moment the Master Key touched it, the Nine-Tails inside the cage felt that he could release more of his chakra.
That chakra quickly enveloped Naruto.
However... the Nine-Tails only released his chakra, not his negative will, so Naruto could still remain himself.
Outside, the Nine-Tails' chakra gradually surfaced around Naruto's body, but the moment it appeared, the limiter suppressed it, preventing any from leaking out.