C429 Ninetailed Monarch
At this time, Naruto was cultivating under the guidance of Kakashi and Kazuma.
Because Naruto had a huge Chakra and the Immortal Body of the Whirlpool Clan, he was able to use the Advanced Shadow Clone Technique and create hundreds of clones!
With hundreds of clones cultivating together, the experience stacked up, and even a pig could learn it in a short period of time