Focused Lexicon

(Tome of Magic, page 229, DnD 3.5)

[General]

Your utterances have greater effect against a certain type of creature.

Prerequisite

Truespeak 6 ranks, ability to speak utterances

Benefit

When you take this feat, choose a creature type (such as aberrations or monstrous humanoids). The DCs of your utterances are increased by I whenever you use them against creatures of the chosen type.

Special

You can take this feat more than once. Its effects do not stack. Each time you take this feat, ii applies to a new creature type.