With Spiritual Energy Depleted, I Bought Nine Fallen Immortal Maidens from the Start

Zhou Fan transmigrates to a world where spiritual energy has dried up and the Immortal Dao has collapsed, becoming a half-demon born of a Golden-Winged Great Roc and a human. Here, the demon race reigns high above the heavens and rules over all living things. The immortals who once looked down upon the mortal realm have been cast into the dust and branded with slave marks, reduced to immortal slaves the demon race can buy and sell at will. Fortunately, Zhou Fan awakens the Immortal Slave Development System. All he has to do is take in immortal slaves, and Zhou Fan receives rewards. The greater an immortal slave’s aptitude, the more lavish the reward. So the moment Zhou Fan enters the immortal slave market, he buys all nine fallen immortal maidens. Once lofty and untouchable, the maidens now have no choice but to shelter beneath his wings, at least for the time being. Just as Zhou Fan takes in his ninth immortal slave, a system notification suddenly rings out. 【Ding! Congratulations, Host, on successfully taking in nine immortal slaves!】 【Ding! Congratulations, Host, you have received a reward: the legacy of Donghuang Taiyi!】