The source of the Xianzhou long-life species' "Endless Lifespan." The remnants of the Aeon of Abundance's influence. Countless years ago, a sovereign's hubris for immortality caused the Xianzhou fleet to sail into the sea of outer space to seek divine recipes.
"We desire to live for endless ages and maintain the empire for all eternity. Unfortunately, human lives have limits and human capacity has its ends. Thus, we send nine Navium Astriger to sail beyond the sky, seeking divine recipes for immortality."