The Princess Poisoned You Again

"My lord, some people say you are old!" --"I am immortal." The legendary cold-faced owl king smiled at the corner of his mouth She is a genius poison doctor in the 21st century, who makes elixirs and medicines to conquer spiritual beasts, and counterattacks and abuses scum; he is the most noble king of Xuanyue Continent, with overwhelming power in the world! But what about the cold-faced king? Is it just a cooperative relationship?