In the Demon-Slaying Bureau, I Draw Li Xiaoyao from the Start

Folks, can you believe it? Ling Xuan, who had been crowned emperor, transmigrated and became a member of the Demon-Slaying Bureau in the capital of Great Zhou. It was a decent job, sure, but it was seriously dangerous. With no connections, no backers, and no skills, he was chosen for a mission where he was supposed to be cannon fodder. Just as he was about to die, his transmigrator perk finally arrived: card draws... And he got lucky, drawing Li Xiaoyao's card from the start. From then on, he went from a nobody to reaching the pinnacle of life. Forty years later, Ling Xuan looked back and saw a mountain of bones behind him. He had long since risen to the top of the world. Truly, life is but a dream, so let me pour a libation to the moon over the river!