Invoke Lightning

Acquisition
Signet of Capture
 * Nightfall
 * Lushivahr the Invoker (Yatendi Canyons)
 * General Tirraj (Dzagonur Bastion)
 * Scribe Wensal (Nundu Bay)
 * Curator Kali (Gate of Madness)
 * Tanmahk the Arcane (The Sulfurous Wastes, only during A Show of Force)
 * Margonite Portal Mage (The Shadow Nexus)
 * Eye of the North
 * Shadow Spawn (Raven's Point, only during Shadows in the Night)