The System Made Me a Princess… So I Beheaded My Ex

"On the emperor’s secret order, she infiltrated Prince Cheng’s household to tear apart his marriage. But when the jealous princess found out, a poisoned arrow struck her chest. Dying and bleeding out, she summoned her last strength— and pinned the secret map of the prince’s underground vault to his most trusted aide’s back. Her voice trembled but firm: “Tell Li Yan… At the third watch, when the fire rises— Burn. Them. All.”