If the human body were a water tank and skills were outlets, then Naruto's skills were like high-pressure water cannons. They might not have seemed powerful in the world of Otherworlders, but that was only because qi limited their upper bounds. As for Naruto now, energy was the one thing he lacked least. Skills were merely methods of attack; while he liked them, he would not force the issue.
In cultivation methods, cultivation came before methods. Cultivation was the essence, while methods were merely means of protection.
Among all the abilities granted by the system, only Threefold Reversal truly changed the essence of life. It had directly evolved Naruto from a carbon-based organism into an energy-based life-form.
With Threefold Reversal activated, Naruto was essentially no different from the Nine-Tails.
He possessed chakra as vast as the Nine-Tails', an immortal and indestructible body, and so far, he had yet to encounter any means capable of restraining him. Sealing techniques did not count, because he was the one who restrained everyone else.
Flying Thunder God had been invented by Tobirama Senju, the Second Hokage. The Fourth Hokage had carried it forward, improving and expanding upon it.
He had developed the second and third stages of Flying Thunder God.
By the time he died, he had even conceived of a fourth stage.
After obtaining those memories and experiences, Naruto quickly mastered it while continuing to develop it further.
Combining it with his insights into Fire Release,
Naruto had already developed the fourth stage of Flying Thunder God: a teleportation array.
Through markings, he could instantly construct a massive teleportation array capable of transferring attacks or people.
But that was not what Naruto wanted.
What Naruto truly liked was the Instant Transmission from Dragon Ball.
By sensing an enemy's chakra through sensory techniques, he