Naruto spoke with the flames of Amaterasu.
"How is Shinshiki receiving my chakra?"
"Once your chakra has been thoroughly burned, Father, it disperses through the outer flames and is received by Shinshiki through his God Tree. Of course, a considerable portion must be offered to the deity represented by this dōjutsu..."
"I see."
"The little flames that scatter away are like my children, and your grandchildren, Father~."
Naruto looked up at the outer flames in the stratosphere.
"Heehee, hahaha~"
There, countless little flames with human faces rose and vanished. They were clearly heading to Shinshiki.
"Honored Father, shall I cut off the channel carrying your grandchildren to Shinshiki? Then he won't be able to receive your chakra!"
Naruto considered his move before acting. "No. Although Shinshiki would gain nothing, I'd still be the only one expending energy. The situation would still be against me."
"Then do you have a good idea, Father?"
Naruto said, "Here's what you should do..."
In the Other Dimension.
Shinshiki sat cross-legged before his God Tree. Its crown burned like a torch, the flames coming from the outer flames released as Naruto burned!
Through his synchronization with the God Tree, pure, concentrated chakra flowed into Shinshiki.
Although his chakra kept increasing at a gratifying rate, Shinshiki's face was filled with dissatisfaction and frustration!
"That human possesses such an enormous source of chakra. Argh, if I could absorb it directly through the God Tree instead of receiving it through an imperfect method like Amaterasu, how much more would I gain?! I might even break straight through the limits of an Upper God! Damn it, why won't that human just hand over his chakra?!!!!!!"
His chest seethed with agitation. He didn't even notice that a foreign consciousness was invading the God Tree, quietly growing stronger as it accumulated...