The Mad King Defies Heaven: Doting on His Astonishing Poison Consort

She, Feng Qingxie, is a top agent of the twenty-first century. In a single twist of fate, she transmigrates into the least favored legitimate daughter of the Feng family, a useless idiot. She sneers. Can’t use spiritual power? Then I’ll show you what a top agent can do! Her stepmother persecutes her, her younger siblings are vicious, so they can’t blame her for paying them back in kind! But... why has this sickly man suddenly changed?