Silver Tongued (5e Feat)
From D&D Wiki
Prerequisites: Charisma 13 or higher
You speak words layered with honey, enticing those who listen to believe and accept anything you say. You gain the following benefits:
- You gain proficiency in the Persuasion or Deception skill.
- When you make a Charisma (Deception) or Charisma (Persuasion) check to have someone believe something you say, you add double your proficiency bonus instead of your normal proficiency bonus.