There are many novels that meet your needs, such as " Empress Elegance "," Abandoned Concubine's Madness "," The Assassin also Traversed in the Series of Dance to Fall into the City "," The Best Woman's Black Belly God "," Fatal Crazy Concubine "," Face Changing Crazy Concubine: Arrogant Charm of the World "," Heavenly Enchantment ", etc. In these novels, the heroine was a ruthless killer, and the plot was full of thrilling elements. I hope you will like my recommendation.😗