Serene Visage

By casting this spell, you imbue yourself with an ephemeral quality that induces others to trust what you say.

(Spell Compendium, p. 182)

Originally posted on D&D tools

Illusion (Glamer)

Level: Bard 1, Sorcerer, Wizard 1,
Components: V, S,
Casting Time: 1 standard action
Range: Personal
Target: You
Duration: 1 minute/level

Simple illusions aid your attempts to be persuasive. You gain an insight bonus equal to one-half your caster level (maximum +10) on Bluff checks.