Invoke Lightning

Acquisition
Signet of Capture:
 * Nightfall
 * Lushivahr the Invoker (Yatendi Canyons)
 * Scribe Wensai (Nundu Bay (Mission))

Related skills

 * Chain Lightning

Usage
The best way to use the skill is to first use Air Attunement since it is an enchantment and you will not get Exhaustion.