Mind Cultivator

Having been summoned from Earth, he realized he was now in a cultivation world where humans could destroy cities and shatter planes with their after shocks. Armed with nothing but a simple cultivation method he traded for sheep skin, he decides to train and go against the heavens like the peerless reincarnated cultivators he read in novels. But what is this? This method doesn’t increase strength? Not even soul strength and at the end I’m as powerless as a mortal? Then what’s the point of it?