Kotario
I must say, one of the best explained cultivations that I have read in webnovel. in other cases they're like you have to do one thing, and then later something occurs and contradicts how cultivation occurs. Of course then the MC of the story is entirely broken without any explanation other than his sould had experience so of course the body would have benefit. (Yet they make clear later in their stories the soul and body are 2 different things and shouldn't have as drastic as an effect like it does on MC)