Power Block

Interrupts deal damage and inflict weakness while granting you a damage increase. This trait can only damage enemies with defiance bars once per interval. — In-game description

Power Block

Specialization

Domination (trait list)

Tier

Grandmaster

Type

Major

Training cost

8 Hero points

Game link

API

API

“

Power Block

Interrupts deal damage and inflict weakness while granting you a damage increase.
This trait can only damage enemies with defiance bars once per interval.

 Damage: 399 (1.5)^?

 Weakness (5s): -50% Endurance Regeneration, +50% Fumble (Unrestricted)

 Weakness (3s): -50% Endurance Regeneration, +50% Fumble (Unrestricted)

 Power Block (6s): +25% Damage

 Power Block (6s): +15% Damage

 Cannot Critical Hit

 Interval: 3 seconds

— In-game description

Related skills

Weapon skills that can trigger this trait

•   Magic Bullet — Pistol
•   Counter Blade — Sword
•   Into the Void — Focus
•   Phantasmal Mage — Torch
•   Illusionary Wave — Greatsword
•   Phantasmal Sharpshooter — Rifle
•   Chaos Storm — Staff
•   Mental Collapse — Spear
•   Vortex — Spear
•   Illusion of Drowning — Trident
•   Mirage Thrust — Sword
•   Wave of Panic — Trident

Utility skills that can trigger this trait

•   Power Lock
•   Signet of Domination — Signet
•   Well of Senility — Well
•   Mirage Advance — Deception
•   Psychic Force — Psionic
•   Tale of the Tortured Mastermind — Tale

Elite skills that can trigger this trait

•   Gravity Well — Well

Profession mechanic skills that can trigger this trait

•   Diversion — Shatter
•   Time Sink — Shatter
•   Bladesong Dissonance — Bladesong
•   Flustering Flute — Instrument
•   Deafening Drum — Instrument

Trait skills that can trigger this trait

•   Lesser Chaos Storm — Method of Madness
•   Syncopate — Syncopate

Version history

For a detailed trait history, see here.

Patch	Changes
April 14, 2026	Increased the damage increase from 10% to 15% in PvP and WvW.
June 24, 2025	This trait no longer increases the cooldown of interrupted skills and now grants a damage bonus when you interrupt an enemy.
February 25, 2020	Competitive content update: (Competitive split) Reduced weakness duration from 5 seconds to 3 seconds.
December 11, 2018	The damage of this skill has been increased by 20% so that it now matches its tooltip. This trait can no longer critically hit foes.
December 12, 2017	Skills, traits, and sigils that have bonus effects when interrupting foes will now activate when used against foes with defiance bars as though they had been interrupted, with a 3-second cooldown.
June 24, 2015	Reduced the damage on interrupt by 17%.
June 23, 2015	Specialization update: Updated this trait to reflect the introduction of the specialization mechanic. Now deals damage and applies 5 seconds of weakness after interrupting a foe. Increased interrupted skill recharge to 15 seconds.
April 18, 2014	Fixed an issue that caused this trait to set skills with zero recharge on 10 second recharge; namely auto-attacks from creatures and players, as well as thief initiative abilities. This trait will no longer trigger through stun immunity effects such as Stability and Defiance.
April 15, 2014	Power Block has been added to the game.

Trivia

• A Guild Wars skill bears the same name as this trait.