I Transmigrated Into My Brother's Novel as the Villainess Demon Empress

She wakes up inside her brother's cultivation novel—as the ruthless Demon Empress fated to be slaughtered by the hero. To make matters worse, a clingy system forces her to play the villain role daily or face penalties. But why fight destiny when being evil is this much fun? With supreme demonic powers, an army of loyal subordinates, and the entire demon realm at her command, she's rewriting the script her way. The protagonist wants her dead? Let him try. She's got plans of her own.