The female protagonist, Ouyang Jing, was an orphan who was tested to have a crippled spiritual root that could not be cultivated for ten thousand years. After rebirth, she became Ouyang Jing, a useless loser that no one expected. Later on, she relied on her alchemy skills and the power of her pet little monster to become a peerless expert out of thin air. She even turned the tables and became the Dark Lord's absolute favorite concubine. I hope you like my recommendation.