Medieval Era: My Crushing Strike Against the Heretics in Iberia

Li Ang transmigrated to the Middle Ages, becoming a near-noble. Why near-noble? Because his knight father had recently passed away. As everyone knows, knighthood is not hereditary, and to survive in this cutthroat world, he had to find a way to retain his noble title. But one slip-up: [You cunning country bumpkin, do you want to die?] [How dare you, a mere knight, provoke me?] [Count Li Ang, who gave you the audacity?] [You, a mere duke, what makes you think you can fight me?] [Welcome, the great Augustus!]