Shroud of Silence

Acquisition
Signet of Capture:
 * Bound Vizu (Tahnnakai Temple (Mission))
 * Silent Ancient Onata (Raisu Palace (Explorable), Raisu Palace (Mission))

Usage Notes

 * An Assassin's version of the Mesmer's Blackout skill. Only that Shroud of Silence is set only to spells, but it can be as devastating against spellcasters like Monks or Elementalists.
 * The drawback of this skill is that it disables the Assassin's spells for 15 seconds.