Chapter 213: Black Zetsu: I Smell My Mother!
Obito returned to the base and reached the underground floor where the Gedo Mazo was placed. Then he activated his Kamui and took Gaara out of the Kamui space.
Seeing this, White Zetsu immediately appeared.
White Zetsu said excitedly, "Yo yo yo! The useless Obito-san actually managed to capture the first Bijuu. That wasn't easy!"
Obito glared at him, too lazy to pay attention.
"Prepare for the operation, I want to transplant the Rinnegan and start sealing Ichibi."
There were two ways to seal the Bijuu into the Gedo Mazo, namely Sealing Technique: Phantom Dragons Nine Consuming Seals and Demonic Statue Chains.
Sealing Technique: Phantom Dragons Nine Consuming Seals could be activated without requiring the Rinnegan, and was mainly aimed at Jinchuriki.
The advantage was that the user could directly bypass the seal and forcibly extract the Bijuu's chakra from the Jinchuriki without damaging the seal.
The disadvantage was that it was very time-consuming. Even if nine Kage-level ninjas were gathered to do it together, it would take three days and three nights. If one person, then it would be extended for several months.
This was another reason why Obito supported Nagato in establishing Akatsuki, namely that more high-level rebel ninjas were needed to help seal the Bijuu at the right time.
Demonic Statue Chains required the Rinnegan to be activated, and was mainly aimed at unsealed wild Bijuu.