In a fantasy world, Li Fusheng, who cultivated merely with ordinary Spiritual Energy, would have to worry about people casting curses on him.
In the Shinobi World, however, even the Otsutsuki—the progenitors of Chakra—did not use pure natural energy; instead, they used energy that had been filtered, making it easier to absorb while sacrificing a fraction of its quality.
Even if an Otsutsuki came personally, they would have no way to curse someone who possessed Spiritual Energy.
Chapter 69