Harlowe
Updated: Sep 23, 2025
Sustained Reaction

Harlowe Skill
Sustained Reaction

  • Game
    Borderlands 4
  • Class
    Harlowe
    Harlowe
  • Skill Tree
    Seize the Day
  • Skill Type
    Kill Skill
  • Skill Tier
    20
  • Max Points
    3
    3 ➜ 6
  • Armor Boost

Sustained ReactionSkill Info

Sustained Reaction

Sustained Reaction

Tier: 20
Max Points: 3

Killing an Entangled enemy restores a portion of Harlowe's Action Skill Duration.

Skill descriptions were adjusted to reflect their real effect.
Kill Skill

Sustained Reaction - Advanced Details

Sustained ReactionBoosting Class Mods

Bio-Robot

Bio-Robot

Base Game
Confirmative Reality
Feedback Loop
Sustained Reaction
Practical Applications

Harlowe's other Kill Skills

Ripple Effect

Ripple Effect

Tier: 10
Max Points: 1

Kill Skill

Whenever Harlowe kills an Entangled enemy, automatically Entangle another nearby enemy.

Unstable Ice-otope

Unstable Ice-otope

Tier: 15
Max Points: 5

Kill Skill

Harlowe deals Bonus Cryo Damage with all sources.

Duration: 8s

Experimentation

Experimentation

Tier: 15
Max Points: 5

Kill Skill

Killing an Entangled enemy causes an Elemental Explosion on all other Entangled enemies.

Highly Efficient

Highly Efficient

Tier: 15
Max Points: 5

Kill Skill

Whenever Harlowe kills an enemy with a Skill, Restore a portion of her Shield Capacity.

Control Group

Control Group

Tier: 20
Max Points: 5

Kill Skill

Killing an Entangled enemy restores a portion of Harlowe's Action Skill Cooldown and Action Skill Duration.

Sustained Reaction

Sustained Reaction

Tier: 20
Max Points: 3

Kill Skill

Killing an Entangled enemy restores a portion of Harlowe's Action Skill Duration.

Gordian Knot

Gordian Knot

Tier: 25
Max Points: 5

Kill Skill

Whenever Harlowe kills an Entangled enemy, she gains a chance to instantly fully restore her Action Skill.

Wasted

Wasted

Tier: 25
Max Points: 1

Kill Skill

Killing an Irradiated enemy or killing an enemy with Radiation Damage leaves behind a Radiation Hazard.

Hazard Damage/s: 803
Hazard Duration: 5s

Sustained ReactionAlternative passive skills

Unstable Ice-otope

Unstable Ice-otope

Tier: 15
Max Points: 5

Kill Skill

Harlowe deals Bonus Cryo Damage with all sources.

Duration: 8s

Experimentation

Experimentation

Tier: 15
Max Points: 5

Kill Skill

Killing an Entangled enemy causes an Elemental Explosion on all other Entangled enemies.

Control Group

Control Group

Tier: 20
Max Points: 5

Kill Skill

Killing an Entangled enemy restores a portion of Harlowe's Action Skill Cooldown and Action Skill Duration.

Sustained Reaction

Sustained Reaction

Tier: 20
Max Points: 3

Kill Skill

Killing an Entangled enemy restores a portion of Harlowe's Action Skill Duration.

Gordian Knot

Gordian Knot

Tier: 25
Max Points: 5

Kill Skill

Whenever Harlowe kills an Entangled enemy, she gains a chance to instantly fully restore her Action Skill.

Ripple Effect

Ripple Effect

Tier: 10
Max Points: 1

Kill Skill

Whenever Harlowe kills an Entangled enemy, automatically Entangle another nearby enemy.