D&Dtools1

Benefit

You can cast spells with verbal components without needing to utter the actual verbal components. You still make noise when casting such a spell (which may be anything from recognizable speech to elaborate song to simple growls), but the noise is unrecognizable as a verbal spell component. (A silence spell still would prevent you from completing the spell, for example.) Spells without verbal components are not affected. This feat is most benefi cial to races incapable of speech in the traditional sense, but still capable of communication. However, it also can prove helpful to characters wishing to disguise the verbal components of their spells.