Eldritch Invocation: Voice of Influence (Patreon)

You are great at manipulating others. Kind of like Beguiling Influence, but better because it doubles your proficiency bonus if you were already proficient with Deception and/or Persuasion.

And yes, it stacks with Beguiling Influence if you already have that invocation.

This was created to work with the Pact of the Crown boon.