Vow of Silence

Acquisition
Signet of Capture
 * Vahlen the Silent (The Sulfurous Wastes)
 * Water Lord (The Hidden City of Ahdashim, only during the quest Gift of the Djinn)
 * Chundu the Meek (Gate of Desolation)

Related skills

 * (elite)
 * (elite)
 * (elite)

Trivia

 * This is one of the 2 Skill pins that were given out with the Guild Wars Nightfall Collector's Edition; the other was "It's Just a Flesh Wound.".