The Rasengan was a powerful Ninjutsu invented by the Fourth Hokage, but it was not a fully developed technique. When the Fourth developed it, his chosen direction had been to amplify its power, which later led to the Big Ball Rasengan.
Indeed, as an enhanced version of the Rasengan, the Big Ball Rasengan possessed tremendous power.
Naruto then further enhanced the power aspect of the Big Ball Rasengan, leading to the Rasenshuriken. Then, in Sage Mode, came the long-range Rasenshuriken. Over the course of its development, the Rasengan had gradually become a Ninjutsu with no upper limit, capable of endless evolution.
The reason for this was also its greatest flaw: it had been an incomplete Ninjutsu from the very beginning.
Whether it was Jiraiya or Naruto, what they learned when they first began training in this Ninjutsu was an incomplete technique. Its nature was wind, and wind-nature chakra possessed extremely destructive power, so they developed it in the direction of breaking through defenses.
But now, Li was using another property of wind chakra.
A Rasengan slightly smaller than a normal one quickly formed in Li's hand.
He slowly wrapped it in more non-elemental chakra, then suddenly raised his hand and made a throwing motion toward Nagato, who floated in midair. Nagato frowned. The Rasengan in Li's hand did appear to contain formidable power, but trying to contend with him using it was still rather laughable.
No matter how powerful that Rasengan was, one had to remember that one of the Six Paths' abilities was absorption.
Though it could not absorb physical damage, it could effortlessly absorb all Ninjutsu damage. Even if Li were to throw a Rasenshuriken at him right now, he could directly absorb it completely.
Not to mention that, in his memories, the Rasengan Li was using could