My Descendants Will Rule the Immortal World by Summer Night, Autumn Air

After being transported to a world of cultivation, Li Xiaojun seeks protection by marrying into an established cultivation clan and becoming a live-in son-in-law. He expects to spend the rest of his life as an insignificant member of the family—until he awakens a system capable of enhancing the talents of his descendants. Ten years of lifespan can grant one of his children a superior spiritual root. A hundred years can produce a supreme-grade spiritual root. A thousand years can create an earth-grade genius, while ten thousand years can give rise to a prodigy blessed with a heavenly spiritual root. As long as he is willing to spend his lifespan, there is no limit to how powerful his descendants can become. Immortal spiritual roots, chaos spiritual roots, innate physiques, divine bodies, immortal bodies, lunar physiques, solar physiques, and even the legendary chaos body— Generation after generation, extraordinary talents are born from his bloodline, and an immortal clan destined to spread across the cultivation world begins its rise.