Ultra-Big Ball Rasengan

This technique adds natural energy to the Big Ball Rasengan. The natural energy rapidly increases it to gigantic proportions, larger than the user's own body, and is created in an instant. Unlike Naruto's Big Ball Rasengan, it can be used with only one hand. If the Ultra-Big Ball Rasengan exploded, it would easily hollow out an entire mountain.

Trivia

 * Two clones of Naruto used this technique outside of Sage Mode, while the real Naruto was gathering natural energy.