Guild Wars 2: Heart of Thorns content


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Disambig icon.png This article is about the engineer skill. For the ranger downed skill, see Thunderclap (ranger skill). For the Lightning Hammer skill, see Thunderclap (Lightning Hammer skill).



0.75¾ Activation time  20 Recharge time  

Engineer tango icon 20px.png Engineer (skill list)
Scrapper tango icon 20px.png Scrapper
Weapon slot 5
Game link
External links

Ionize an area, bringing down the power of lightning to stun foes and damage them over its duration.

 Damage.png Damage (5x): 1,615 (4.0)?
 Damage.png Damage (5x): 910 (2.25)?
 Vulnerability.png Vulnerability (8s): 1% Incoming Damage, 1% Incoming Condition Damage
 Vulnerability.png Vulnerability (6s): 1% Incoming Damage, 1% Incoming Condition Damage
 Stun.png Stun: 1 second
 Miscellaneous effect.png Pulses: 6
 Interval.png Interval: 1 second
 Radius.png Radius: 240
 Combo.png Combo Field: Lightning
 Range.png Range: 1,200

— In-game description [?]

Related traits[edit]

Scrapper Scrapper[edit]


  • Stuns and does no damage on the initial tick, followed by 5 damage pulses.

Version history[edit]

For a detailed skill history, see here.

Patch Changes
February 25, 2020 Competitive content update:
  • (Competitive split) Reduced power coefficient per strike from 0.8 to 0.45. Reduced vulnerability duration from 8 seconds to 6 seconds.
October 01, 2019
  • Increased damage by 6%. Reduced recharge from 24 seconds to 20 seconds.
July 26, 2016
  • This skill no longer deals damage on initial impact, but it still stuns enemies.
  • Damage for all pulses has been increased by 26%, for an overall damage increase of 5%.
February 23, 2016
  • Updated the area-of-effect rings to show combo rings to allies and red rings to enemies.
October 23, 2015 Heart of Thorns release:
  • Thunderclap has been added to the game.