Thunderclap

Acquisition
Signet of Capture
 * Chrysos the Magnetic (Thunderhead Keep)
 * Kratos the Foul (Iron Mines of Moladune)
 * The Inquisitor (Iron Mines of Moladune)
 * Mursaat Elementalist (boss) (Ice Floe)
 * Maida the Ill Tempered (Ring of Fire)
 * Optimus Caliph (Abaddon's Mouth)
 * Talios the Resplendent (The Battle for Lion's Arch (explorable area) (only during The Battle for Lion's Arch))