Tailed Beast Rasengan

To get around the fact he couldn't use either the Tailed Beast Ball or Shadow Clone Technique while in Nine-Tails Chakra Mode, Killer B advised Naruto to use his chakra arms to attempt to create a Rasengan. The results were incomplete, though they looked like a combined version of the Rasengan and Tailed Beast Ball.

Naruto is having difficulty making the ratio of black and white chakra 8:2. Despite the fact he has a chakra shroud while practicing the technique, Naruto's hands are shown to be injured as he practices. He asks Killer B to watch and tell him when he's gotten the ratio right so he can remember the feel of the technique.

Naruto has also noted that this new Rasengan is very heavy; he can barely hold it up. This is likely because of the Nine-Tails' chakra, which has been described as very dense in previous instances. According to Killer B he's almost perfected it, and the best way to learn and master it was from real life experience on the battlefield.