Thunderclap

Description
For 8...18 seconds, if target foe is struck for lightning damage, that foe and adjacent foes are knocked down, and you lose 15...9 Energy or Thunderclap ends. This is an elite skill.

Acquisition
Signet of Capture:
 * Chrysos the Magnetic (Thunderhead Keep)
 * The Inquisitor (Iron Mines of Moladune)
 * Kratos the Foul (Iron Mines of Moladune)
 * Maida the Ill Tempered (Ring of Fire)
 * Mursaat Elementalist (Boss) (Ice Floe)
 * Optimus Caliph (Abaddon's Mouth)

Usage Notes

 * With a lightning wand and good attack timing, you can effectively keep another player on the ground for the whole duration of the hex (assuming no hex removal). This won't leave you with much energy in the end though, if any at all.
 * Usefulness in PvE is very dependent on the monsters you encounter, keeping in mind that some, such as Giants can't be knocked down at all.
 * If you only wish to interrupt, Spinal Shivers and a cold weapon would be a cheaper non-elite choice. Especially against Giants.

Related Skills

 * Earthquake
 * Lightning Surge
 * Meteor
 * Meteor Shower
 * Mind Shock
 * Shock
 * Water Trident
 * Whirlwind
 * Spike Trap (Ranger)
 * Backbreaker (Warrior)
 * Bull's Charge (Warrior)
 * Bull's Strike (Warrior)