Supreme Ultimate Rasengan

Naruto merges his Rasengan with Minato's and the Ryūmyaku chakra to create a Rasengan swirling-like drill that drills through the opponent causing major damage.

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.