Your Highness, the Princess Consort Has Been Driving the Villain Mad with Her Bogus Divinations for Ages

Other people's fortune-tellers: divining, reading the stars, and seeing the secrets of fate.

My family's fortune-teller, A Jiu: poisoning, releasing cockroaches, and tearing down load-bearing walls.

Other people's formation-breaking: finding the core, chanting incantations, and borrowing the spiritual energy of heaven and earth.

My A Jiu: getting the entire city to bang gongs and drums, using sound vibrations to shatter the enemy's soundproof formation.

Faced with an ancient treasure, she says, "It's thirsty. It wants something sour." She pours a pot of vinegar over it, and the treasure cracks on the spot.

The aloof regent Xiao Yu refuses to believe it, until he sees A Jiu point at a roof tile and say, "It was terrified before it died. It said it saw a whole lot of crabs." Then she follows the clues and takes down the enemy's entire hideout.

Xiao Yu: ... Fine. The end of science is the supernatural, and the end of the supernatural is A Jiu's croton seeds and vinegar.