The Miraggle

• Gain proficiency in Persuasion. If you're already proficient, gain Expertise instead.
• Three times per short rest, when you attempt a Persuasion check against a creature capable of seeing you, you may perform The Miraggle™.

If you physically waggle your eyebrows at the table while speaking in character:

• You gain advantage on the Persuasion check.
• On a natural 20, the DM must describe how unnervingly effective your eyebrows were.