The Ghost Emperor's Heaven-Defying Mad Consort

She is a modern-day all-around agent who transmigrates into the body of a royal princess, supposedly born useless. When a useless girl becomes a genius, she goes from timid to brazen. She will reclaim, one by one, everything they owe her! Cultivation, talisman drawing, alchemy: she excels at them all. Her name resounds far and wide, and she looks down on the world. You call that useless? You must be blind! That cold-hearted prince from a foreign land only saved her by chance, yet he has clung to her ever since. Why? When a cold heart meets a black heart, whoever falls first warms the bed...