Alluring

(Song and Silence: A Guidebook to Bards and Rogues, page 38, DnD 3.0)

[General]

Others have an inexplicable urge to believe your every word.

Prerequisite

Persuasive, Trustworthy

Benefit

You get a +2 bonus on Diplomacy checks and add +2 to the save DCs of all your mind-affecting, language-dependent spells.