Supreme Ultimate Rasengan

Naruto merges his Rasengan with Minato's to create a Rasengan swirling-like drill that drills through the opponent causing major damage. The Supreme Ultimate Rasengan like the Tornado Rasengan has several streams of chakra spiraling around the sphere, but it has far more streams completely covering the users' bodies. Also the sphere itself seemed unstable, with the shape fluctuating.

Trivia

 * The is a Taoist concept which refers to the undifferentiated absolute and infinite potentiality, encompassing the entire universe.
 * Minato states that when two similar chakras are near each other, they resonate. And when they are combined, the strongest Rasengan can be formed.