Six Paths: Ultra Big Ball Rasenshuriken is ... Undoubtedly, it is one of Naruto's strongest jutsu, if not the strongest.

Ocular Jutsu, AKA dojutsu, have come a long way since ... Shippuden episode 421, "The Sage of Six Paths". There's an honest chance that the Rinne Sharingan is stronger than both the Tenseigan ...

In fact, it wouldn't be a stretch to say that at his peak, he might just be the strongest ninja in history ... In fact, Naruto's biggest power isn't his Six Paths abilities, or even Kurama.