The Immortal Emperor Reborn: Sister-in-Law, Please Behave

My sister-in-law is gorgeous, and two souls share one body. 【A powerful figure reborn】+【Spiritual Qi Revival】. The strongest figures on the Fengyue Continent are known as 【One Emperor】, 【Three Sovereigns】, and 【Eight Saints】. Lin Xiancheng, the Spell Sovereign and one of the Three Sovereigns, transmigrates back to the year he was twelve. At this point, spiritual qi revival is still three years away. On the Fengyue Continent, there is no trace of the immortal path, and martial arts reign supreme.