Guild Wars 2: Heart of Thorns content

Blast Gyro

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Blast Gyro.png

Blast Gyro

Engineer icon small.png Engineer (skill list)
Scrapper icon small.png Scrapper
Tool belt
Bypass Coating.png Bypass Coating
Training cost
15 Hero points
Game link
Blast Gyro.jpg

Click to enlarge

0.25¼ Activation time  
15 Recharge time
20 Recharge time
20 Recharge time
Blast Gyro

Well. Unleash a blast gyro to begin a countdown to a tremendous blast.

Damage.png Damage: 731 (2.75)?
Damage.png Damage: 3 (0.01)?
Might.png2 Might (15s): 60 Condition Damage, 60 Power
Might.png2 Might (6s): 60 Condition Damage, 60 Power
Might.png Might (12s): 30 Condition Damage, 30 Power
Stun.png Stun: 3 seconds
Stun.png Stun: 2 seconds
Miscellaneous effect.png Pulses: 4
Duration.png Blast Delay: 3 seconds
Radius.png Radius: 240
Explosion.png Explosion
Unblockable.png Unblockable
Combo.png Combo Finisher: Blast
Combo.png Combo Field: Fire

— In-game description

Related traits[edit]

Explosives Explosives

Firearms Firearms

Inventions Inventions

Alchemy Alchemy

Tools Tools

Scrapper Scrapper


  • Throughout the Blast Delay, the Blast Gyro is also a Fire Combo Field.
  • The pulses multiply might gain. Including the fire blast self-combo, this skill grants 11 stacks of might with staggered durations.

Version history[edit]

For a detailed skill history, see here.

Patch Changes
November 28, 2023
  • Reduced the cooldown from 20 seconds to 15 seconds in PvE only. Reduced the power coefficient from 3.5 to 2.75 in PvE only.
July 18, 2023
  • Reduced cooldown from 25 seconds to 20 seconds in PvE only. Increased might duration from 8 seconds to 15 seconds in PvE only.
March 14, 2023
  • Adjusted might from 2 stacks for 6 seconds to 1 stack for 12 seconds in PvP only.
August 23, 2022
  • (PvE only) Now stuns enemies for 3 seconds instead of knocking them back. Damage multiplier increased from 2.65 to 3.5.
  • (Undocumented) Now stuns enemies for 2 seconds instead of knocking them back in WvW and PvP.
February 28, 2022 End of Dragons release:
  • (Undocumented) Added tooltip fact Defiance Break.
February 25, 2020 Competitive content update:
  • This skill is now considered an Explosion for the purposes of the Explosives trait line.
  • (Competitive split) Reduced power coefficient from 2.25 to 0.01. Reduced might duration from 8 seconds to 6 seconds. Reduced cooldown from 25 seconds to 20 seconds.
April 23, 2019
  • Gyros can now be used underwater.
March 26, 2019
  • Fixed a bug that prevented Shocking Speed from granting superspeed on the final tick of Blast Gyro.
March 05, 2019
  • This skill has been reworked and renamed Blast Gyro. The gyro now creates a fire field that follows the engineer while it pulses might to nearby allies every second during its countdown to a significant explosion.
August 28, 2018
  • This skill now scales its damage with the engineer's attributes.
October 23, 2015 Heart of Thorns release:
  • Blast Gyro has been added to the game.