On the Jiuzhou Continent, cultivators build their practice on their "lifespan reserve." The greater their reserve, the higher their cultivation and the longer they live. Those who reach the Longevity Realm or higher face a trial once every hundred years: their bodies split apart from within, and their Dao foundations shake. Unless they promptly use dual cultivation to draw another person's Dao foundation into their body and rebuild their own, their body and spirit will be destroyed within three years.
