Staying in the Empire and Cheating on the Grand Duke

[Spy War + Interstellar War + Wits + Disguise Identity] Yang Zhao's biggest dream in this life is to be a comedian. But after posing as an Imperial soldier on the battlefield, he discovered that he had somehow gained the ability to detect lies. After a confrontation, he, the impostor, was forced to become the heir to the old Duke's family. In order to save his life and return alive, he had to start using false identities to deceive people on the battlefield. The first rule of cross-talk: When everyone firmly believes that you are true, then you are true. When lies become art, the battlefield is the most gorgeous stage.