The Rasengan worked by gathering chakra in the hand, making it flow continuously in irregular directions, and compressing it into a palm-sized ball of non-elemental chakra to attack an opponent.
This technique represented the pinnacle of shape transformation-and precisely because of that, it was not actually limited to chakra.
After all, its essence was a sphere of energy flowing irregularly in opposing directions. Even without chakra, any flowing energy-magic, ki, or even cursed energy-could be used to create a sphere with a similar effect, provided it could be projected outside the body!
That brought us to an NDS game the author had played as a kid-Jump Ultimate Stars. Naruto and Son Goku's combination move in it was the Super Spiral Spirit Bomb!!! It combined the Spirit Bomb with the Rasengan, making the Spirit Bomb spin irregularly-even Frieza would die if that hit him, right?
Back to the point, Uzumaki Gamu slammed his shot-blocking Rasengan down onto the Finger Cursed Spirit. It exploded, grinding the Finger Cursed Spirit to pieces... until only the indestructible Sukuna's Finger remained standing there!
"S-so powerful!!!" Yuji Itadori was stunned-he had never imagined the move would be that devastating... Could he learn it?
If he could... then he really could fulfill his grandfather's wish!
Yuji Itadori's grandfather's dying wish had been for him to die surrounded by others in the distant future! Although Yuji Itadori's interpretation seemed slightly off, he believed he needed to help as many people as possible to fulfill it. He also believed people should die proper deaths, so he would do everything he could to help others!
But what had happened earlier had also taught him... without power, far too many things would remain beyond his reach!
And so he, too, began craving power!
Uzumaki Gamu picked up Sukuna's Finger, walked over