To see if Nature Transformation can be added

John met with the two Sage's atop the Hokage Rock and discovered that they wanted to see if he could combine Nature Transformation with the Rasengan. John knew that he could effortlessly perform the most advanced Jutsu of almost any Nature, which presented an alternative development path, rather than simply Nature Transformation, perhaps elemental Kekkei Genkai could be used in its place.

Leaving them for the outskirts of the Leaf Village, John used Shadow Clones to hasten the learning process. He made two Hundred and fifty Clones in all while twenty five of the practiced using Rasengan with Either Gale-Style, Vapour-Style, or Lava Style, another lot od twenty Five would practice with Explosion-Style or Crystal-Style, followed by another lot of twenty five using Magnet-Style or Scorch-Style Rasengan and so on, while he would focus on using the Susano'o. John decided it would be best if he were to practice in the Kamui Dimension so as not reveal any secrets on the upcoming Finals, which was why his clones were in there as well. After all, without having a few things to Help you, and ones that no else knows about, can be extremely helpful and Effective.

(Kamui Dimension)

John had been practicing using Susano'o for Hours and Hours in the Kamui Dimension, and when finally managed to get to the Susano'o's Third Stage, as in A Full Skeleton, he left The Dimensions and dispersed his remaining Clone's. After learning a great deal from thie he returned to his team to wait out the two months reprieve.