Type: Racial
Source: Races of Stone
You can infuse your sneak attacks with the magical essence of silence.
Prerequisite: Whisper gnome, sneak attack ability.
Benefit: You can use one of the daily uses of your silence spell-like ability to turn a sneak attack into a silencing strike. You must declare the use of this feat before you make your attack roll. If you hit your target with a melee attack and successfully deal sneak attack damage, a field of supernatural silence also surrounds the target. The effect of this field of silence is identical to that of the spell of the same name, except that there is no saving throw to resist this effect. The silence lasts for a number of rounds equal to your character level.
You can dismiss the field as a standard action.