Verata's Sacrifice

Acquisition
Skill Trainers: Signet of Capture:
 * Gammel (Copperhammer Mines)
 * Dakk (Ember Light Camp)
 * Verata the Necromancer (Kessex Peak, near where Galrath spawns only if no one in your group has the quest The Villainy of Galrath).

Related skills

 * Blood of the Master