Liar’s gift makes even the most barefaced untruth seem plausible: you gain advantage on Charisma (Deception) checks to convince another creature of the truth of whatever you’re saying. On a failed check, the creature knows that you tried to manipulate it with magic.    If you successfully lie to a creature that has a friendly attitude toward you, it must make a Charisma saving throw. On a failed save, you can also coax the creature to reveal a potentially embarrassing secret. The verbal component of this spell is the lie you are telling.