"Yes." Ling Xuan's gaze settled on Jiraiya's right hand. "I can provide you with something you need as well. In return, you'll grant me access to part of your knowledge base. It's a fair and equal exchange."
"Oh? Something I need?" Jiraiya held out his right hand with interest. "I don't even know what I need. Why don't you tell me?"
"For example..." Countless streams of data flashed through Ling Xuan's eyes as he spoke slowly. "The A-rank ninjutsu you know: Rasengan."
"The pinnacle of shape transformation, it spins chakra at extremely high speeds in every direction, then compresses it inside a spherical shell formed from another stream of chakra. It's tremendously powerful, but..."
At that moment, Ling Xuan's Eye of Truth was clearly observing the chakra execution model of the Rasengan inside Jiraiya's body.
"But its energy-conversion efficiency has a theoretical flaw."
"What?" Jiraiya could no longer remain calm. He shot to his feet.
Rasengan was the proud creation of his genius student, Minato. It was the pinnacle of shape transformation. How could it have a flaw?
"In the final stage of compressing the chakra, to maintain the sphere's absolute stability, friction causes energy loss between the chakra forming the shell and the chakra spinning rapidly inside. This loss keeps the Rasengan from reaching its theoretical maximum power."
Ling Xuan stated calmly, "Furthermore, this unstable energy friction is one of the fundamental reasons the technique can't be combined with a nature transformation. It disrupts the most stable chakra structure required for a nature transformation. Minato must have wanted to infuse his Wind Release chakra into it, but in the end, the idea never advanced beyond theory."
Jiraiya was utterly stunned. This secret was known only to a handful of people, including him and Teacher Sarutobi.
Yet the boy before