The Fairy World Sent Me to Be an Undercover Agent

I'm just a little monk in the world who eats and drinks and becomes a golden immortal overnight? It turns out that I did something big and let go of the previous generation Demon King Xiaoqing? Why are the monsters doing so well in the human world, and the Xianxia sect comes out to have fun! I can't carry it alone! ————The cry from a golden immortal monk who accidentally became a high-level member of the demon clan.