KasiCair
This really exemplifies why Rei based almost all of their powergrowth based on his Rabbit Goddess Waifu. The artificial Dimension, where all his nature power grows and develops as a giant universe batter / space. The artificial tailed beast based on his dimension, the users soul, the users chakra, and nature energy, all to give Rei and his girls their own growing powerbase, that was all their own and not dependent on another's power. Just as Kaguya was the progenitor of chakra of their planet, Rei moved himself and all his waifu's away from the dependency of Kaguya's chakra and they all became their own progenitor / origin of chakra powerbase. They are all similar but different even if they act almost entirely the same they "ARE" independent. Eventually Rei will match his Rabbit waifu in power, but that is a long way off. Rei analyses every thing that Kaguya does and tries to math / map its development to create techniques able to be reproduceable to him and the girls. Because it is all innate intuitive for Kaguya, but not for Rei and the rest of his girls. I love how this chapter shows that Kaguya is the lovable, disty, natural genius, OP wife.