Harlowe
Updated: Sep 10, 2025
Too Coolant for Schoolant

Harlowe Skill
Too Coolant for Schoolant

  • Game
    Borderlands 4
  • Class
    Harlowe
    Harlowe
  • Skill Tree
    Seize the Day
  • Skill Type
    Passive Skill
  • Skill Tier
    10
  • Max Points
    5
    5 ➜ 5
  • Armor Boost

Too Coolant for SchoolantSkill Info

Too Coolant for Schoolant

Too Coolant for Schoolant

Tier: 10
Max Points: 5

Whenever Harlowe deals Cryo Damage, gain increased Action Skill Cooldown Rate.

Duration: 4s

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

Too Coolant for Schoolant - Advanced Details

Too Coolant for SchoolantBoosting Class Mods

No Class Mod adds points to Too Coolant for Schoolant.

Harlowe's other Passive Skills

Personal Observation

Personal Observation

Tier: 0
Max Points: 5

Passive Skill

Harlowe deals increased Melee Damage and her Melee Attacks gain a chance to Entangle enemies.

Action at a Distance

Action at a Distance

Tier: 0
Max Points: 5

Passive Skill

Whenever Harlowe applies a Status Effect to an enemy, she gains a chance to apply that Status Effect to each Entangled enemy.

Momentum

Momentum

Tier: 0
Max Points: 5

Passive Skill

Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.

Duration: 12s

Mains Hum

Mains Hum

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.

Quantum Immortality

Quantum Immortality

Tier: 0
Max Points: 5

Passive Skill

Whenever Harlowe Entangles an enemy, she gains Health Regeneration.

Duration: 8s

Make Extraordinary

Make Extraordinary

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains Critical Hit Chance with all Skills.
This chance increases every time Harlowe Entangles an enemy.
This effect can stack.

Max Stacks: 10
Stack Duration: 8s

Pulse Drive

Pulse Drive

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Action Skill Cooldown Rate.

Parallel Circuit

Parallel Circuit

Tier: 0
Max Points: 5

Passive Skill

After triggering or retriggering an Action Skill, Harlowe gains increased Gun Damage.

Duration: 8s

Field-Ready Prototype

Field-Ready Prototype

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Action Skill Damage.

PPE

PPE

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Maximum Shield Capacity and Shield Recharge Rate.

Cyclotron

Cyclotron

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Fire Rate.

Fuzzy Math

Fuzzy Math

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Status Effect Chance.

Mass Function

Mass Function

Tier: 5
Max Points: 5

Passive Skill

Harlowe and her allies gain increased Reload Speed for every Entangled enemy.

Neutron Decay

Neutron Decay

Tier: 5
Max Points: 5

Passive Skill

Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage.
This effect can stack.

Max Stacks: 5
Stack Duration: 12s

Heat Death

Heat Death

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Cryo Efficiency.

Bright Future

Bright Future

Tier: 5
Max Points: 5

Passive Skill

Whenever Harlowe triggers or retriggers an Action Skill, she gains increased Fire Rate.

Duration: 8s

Negative Entropy

Negative Entropy

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Gun Handling. This bonus is Doubled while an enemy is in Stasis.

Periodic Table Flip

Periodic Table Flip

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Elemental Damage, Status Effect Application Chance, and Cryo Effectiveness.

Elementary

Elementary

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Elemental Damage and Status Effect Damage.

Bleeding Edge

Bleeding Edge

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Reload Speed.

Resonance Cascade

Resonance Cascade

Tier: 10
Max Points: 3

Passive Skill

Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage.
This effect can stack.

Max Stacks: 5
Stack Duration: 8s

Creative Overflow

Creative Overflow

Tier: 10
Max Points: 3

Passive Skill

Harlowe deals increased Gun Damage based on her Overshield. The more Overshield she has, the bigger the bonus.

Confirmative Reality

Confirmative Reality

Tier: 10
Max Points: 3

Passive Skill

Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.

Absolute Zero

Absolute Zero

Tier: 10
Max Points: 5

Passive Skill

Whenever Harlowe Freezes an enemy, she receives a Stack of Zero Point. For every Stack of Zero Point, her Action Skill Duration freezes for a short time.

Cryodynamics

Cryodynamics

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Cryo Damage.

Too Coolant for Schoolant

Too Coolant for Schoolant

Tier: 10
Max Points: 5

Passive Skill

Whenever Harlowe deals Cryo Damage, gain increased Action Skill Cooldown Rate.

Duration: 4s

Precision Engineering

Precision Engineering

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Critical Hit Damage.

Enriched

Enriched

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Radiation Damage.

Elephant's Foot

Elephant's Foot

Tier: 10
Max Points: 1

Passive Skill

Whenever Harlowe's Shield breaks, she deals Radiation Damage to all Entangled enemies.
Harlowe gains Overshield equal to the amount of Damage dealt this way.

Cooldown: 16s

Great Red DoT

Great Red DoT

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Status Effect Duration.

Test Subjects

Test Subjects

Tier: 10
Max Points: 5

Passive Skill

Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.

Duration: 8s

Get Up and Go

Get Up and Go

Tier: 10
Max Points: 5

Passive Skill

Whenever Harlowe activates or retriggers an Action Skill, she gains increased Movement Speed.

Duration: 8s

Blue Shift

Blue Shift

Tier: 15
Max Points: 5

Passive Skill

While her Action Skill is Cooling Down, Harlowe deals Bonus Cryo Damage with her Melee Attacks. While her Action Skill is Active, Harlowe deals Bonus Radiation Damage with her Melee Attacks.

Decoherence

Decoherence

Tier: 15
Max Points: 5

Passive Skill

Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.

Gamma Ray Burst

Gamma Ray Burst

Tier: 15
Max Points: 5

Passive Skill

Whenever Harlowe retriggers her Action Skill, the next shot fired from her Gun drains her Shield and deals Bonus Radiation Damage based on the amount drained.

Harlowe's Certainty Principle

Harlowe's Certainty Principle

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Gun Handling, which is further increased with every enemy in her Flux Generator.

Excited State

Excited State

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Critical Hit Damage. Whenever an enemy is damaged by Harlowe's Action Skill, the next shot on that enemy will be an Automatic Critical Hit.

Refraction

Refraction

Tier: 15
Max Points: 5

Passive Skill

Harlowe and her allies gain Ricochet Chance against Entangled enemies. Critical Hits Double this chance.
Ricochets have Reduced Damage.

Ricochet Damage: -50%

Concurrence

Concurrence

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Action Skill Duration for every Entangled enemy.

Force of Will

Force of Will

Tier: 15
Max Points: 5

Passive Skill

Whenever Harlowe Critically Hits an enemy, Daze that enemy.
Dazed enemies have decreased Movement Speed and Attack Speed.
Daze can stack.

Stack Duration: 7s

Keep Ice on That

Keep Ice on That

Tier: 15
Max Points: 5

Passive Skill

All Cryo Damage Harlowe deals gains Lifesteal. If Harlowe's Health is full, she gains Overshield instead.

Indiscrete Math

Indiscrete Math

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Splash Damage.

Practical Applications

Practical Applications

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Skill Damage.

Carry the One

Carry the One

Tier: 15
Max Points: 5

Passive Skill

Whenever Harlowe Entangles an enemy, she gains a chance to Entangle another nearby enemy.

Glow Up

Glow Up

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains Critical Hit Chance with Guns against Irradiated enemies.

Poisoned Sun

Poisoned Sun

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Radiation Damage and Irradiation Chance.

Mechanical Brilliance

Mechanical Brilliance

Tier: 15
Max Points: 5

Passive Skill

Whenever Harlowe damages an enemy with a Skill, she gains increased Skill Damage.
This effect can stack.

Max Stacks: 5
Stack Duration: 12s

Feedback Loop

Feedback Loop

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate.
This effect can stack.

Max Stacks: 5
Stack Duration: 8s

Latent Charge

Latent Charge

Tier: 20
Max Points: 5

Passive Skill

Harlowe deals Bonus Damage with Guns, Melee Attacks, and Action Skills while she has Overshield. The more Overshield she has, the bigger the bonus.

Critical Funding

Critical Funding

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Critically Hits an enemy, she gains a chance to Entangle it, and Refills a portion of her Gun's Magazine.

Chance: 15%

Distribution Function

Distribution Function

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe's Action Skill damages an enemy, restore a portion of her and all allies' Shield Capacity. If their Shields are full, gain Overshield instead.

Accretion

Accretion

Tier: 20
Max Points: 5

Passive Skill

Harlowe and her allies gain Lifesteal against Entangled enemies.

Jaunt

Jaunt

Tier: 20
Max Points: 1

Passive Skill

Press and hold Melee Attack to make Harlowe swap places with her Flux Generator.

Slingshot

Slingshot

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Dazes an enemy, she also Entangles them, and then she gains increased Movement Speed.

Duration: 8s

Endothermic Reaction

Endothermic Reaction

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Freezes an enemy, create an Endothermic Aura that deals constant Cryo Damage to enemies around it.
Harlowe's Endothermic Aura deals increased Damage based on her Overshield.
The more full, the greater the bonus

Cooldown: 4s

Heat Sink

Heat Sink

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Freezes an enemy, she gains increased Action Skill Cooldown Rate.

Duration: 8s

Flash Freeze

Flash Freeze

Tier: 20
Max Points: 1

Passive Skill

Whenever Harlowe deals Cryo Damage with an Action Skill, she gains a chance to Freeze that enemy.

Duration: 8s

Domino Effect

Domino Effect

Tier: 20
Max Points: 3

Passive Skill

Whenever Harlowe deals Splash Damage to an Entangled enemy, she gains a chance to trigger Entangled Damage Share again.

Core Sample

Core Sample

Tier: 20
Max Points: 5

Passive Skill

Harlowe gains Lifesteal against Frozen enemies. If she's at full Health, she gains Overshield instead.

Fissile Launcher

Fissile Launcher

Tier: 20
Max Points: 3

Passive Skill

Whenever Harlowe damages an Irradiated enemy or an Entangled enemy, shoot a Radiation Dart at another enemy.

Cooldown: 2s

Chain Reactor

Chain Reactor

Tier: 20
Max Points: 3

Passive Skill

Harlowe deals Bonus Radiation Damage to Entangled enemies.

Break the Ice

Break the Ice

Tier: 20
Max Points: 1

Passive Skill

Convert all CHROMA Accelerator Damage to Cryo Damage.

Eureka!

Eureka!

Tier: 20
Max Points: 1

Passive Skill

Whenever Harlowe enters Fight For Your Life, she throws a free Unstable Energy Pocket at a nearby enemy - if there are any.

Damage: 8,923
Cooldown: 40s

Rounding Up

Rounding Up

Tier: 20
Max Points: 5

Passive Skill

For every enemy her Action Skill damages, Harlowe gains increased Gun Damage when her Action Skill ends.
This effect can stack.

Max Stacks: 5
Stack Duration: 14s

Runaway Reaction

Runaway Reaction

Tier: 25
Max Points: 1

Passive Skill

Harlowe gains increased Status Effect Chance. Whenever Harlowe applies a Status Effect to an enemy, it becomes Entangled.

Meltdown

Meltdown

Tier: 25
Max Points: 5

Passive Skill

Harlowe's Critical Hits with Guns deal Bonus Radiation Damage.

Exposed Core

Exposed Core

Tier: 25
Max Points: 1

Passive Skill

While her Shield is down, Harlowe gains increased Status Effect Chance.

Annihilation

Annihilation

Tier: 25
Max Points: 1

Passive Skill

Harlowe's Flux Generator occasionally throws Grenades. If Harlowe or her Allies are inside the Flux Generator and have a Grenade equipped, it throws a copy of that Grenade.

Grenade Spawn Rate: 7s

Pencils Down

Pencils Down

Tier: 25
Max Points: 3

Passive Skill

While Harlowe's Action Skill is Cooling Down, she grants herself and her allies increased Reload Speed and Fire Rate.

Stun Lock

Stun Lock

Tier: 25
Max Points: 1

Passive Skill

Whenever Harlowe Critically Hits an enemy, she briefly puts that enemy into Stasis.
This form of Stasis lasts for a short duration, or until the enemy is shot again.

Cooldown: 10s

Freeze Frame

Freeze Frame

Tier: 25
Max Points: 1

Passive Skill

Harlowe's Guns deal Bonus Cryo Damage for every enemy she has in Stasis.
This effect can stack.

Max Stacks: 10

Triple Point

Triple Point

Tier: 25
Max Points: 1

Passive Skill

Whenever Harlowe deals non-Cryo Damage to an Entangled enemy, she deals Bonus Cryo Damage to that enemy.
If she deals Cryo Damage to an Entangled enemy, she deals increased bonus Damage.

Bonus Cryo Damage: +15% of Non-Cryo Damage Dealt
Bonus Cryo Damage: +30% of Cryo Damage Dealt

Opposing Force

Opposing Force

Tier: 25
Max Points: 3

Passive Skill

Whenever Harlowe Freezes an enemy, she gains increased Action Skill Cooldown rate.
This effect can stack.

Max Stacks: 10
Stack Duration: 16s

Cold Welding

Cold Welding

Tier: 25
Max Points: 3

Passive Skill

Whenever Harlowe Freezes an Entangled enemy, it deals Cryo Damage to itself and all other Entangled enemies.

Duration: 8s

Alternative Fuel Source

Alternative Fuel Source

Tier: 25
Max Points: 5

Passive Skill

Whenever Harlowe activates CHROMA Accelerator, drain her Shield and Amp her next Unstable Energy Pocket.

Dirty Bomb

Dirty Bomb

Tier: 25
Max Points: 1

Passive Skill

Whenever Harlowe Irradiates an enemy, create a Radiation Explosion on that enemy.
The Radiation Explosion Damage is based on the total Irradiated Damage.

Too Coolant for SchoolantAlternative passive skills

Quantum Immortality

Quantum Immortality

Tier: 0
Max Points: 5

Passive Skill

Whenever Harlowe Entangles an enemy, she gains Health Regeneration.

Duration: 8s

Concurrence

Concurrence

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Action Skill Duration for every Entangled enemy.

Indiscrete Math

Indiscrete Math

Tier: 15
Max Points: 5

Passive Skill

Harlowe gains increased Splash Damage.

Parallel Circuit

Parallel Circuit

Tier: 0
Max Points: 5

Passive Skill

After triggering or retriggering an Action Skill, Harlowe gains increased Gun Damage.

Duration: 8s

Pulse Drive

Pulse Drive

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains increased Action Skill Cooldown Rate.

Force of Will

Force of Will

Tier: 15
Max Points: 5

Passive Skill

Whenever Harlowe Critically Hits an enemy, Daze that enemy.
Dazed enemies have decreased Movement Speed and Attack Speed.
Daze can stack.

Stack Duration: 7s

Keep Ice on That

Keep Ice on That

Tier: 15
Max Points: 5

Passive Skill

All Cryo Damage Harlowe deals gains Lifesteal. If Harlowe's Health is full, she gains Overshield instead.

Make Extraordinary

Make Extraordinary

Tier: 0
Max Points: 5

Passive Skill

Harlowe gains Critical Hit Chance with all Skills.
This chance increases every time Harlowe Entangles an enemy.
This effect can stack.

Max Stacks: 10
Stack Duration: 8s

Endothermic Reaction

Endothermic Reaction

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Freezes an enemy, create an Endothermic Aura that deals constant Cryo Damage to enemies around it.
Harlowe's Endothermic Aura deals increased Damage based on her Overshield.
The more full, the greater the bonus

Cooldown: 4s

Domino Effect

Domino Effect

Tier: 20
Max Points: 3

Passive Skill

Whenever Harlowe deals Splash Damage to an Entangled enemy, she gains a chance to trigger Entangled Damage Share again.

Bright Future

Bright Future

Tier: 5
Max Points: 5

Passive Skill

Whenever Harlowe triggers or retriggers an Action Skill, she gains increased Fire Rate.

Duration: 8s

Slingshot

Slingshot

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Dazes an enemy, she also Entangles them, and then she gains increased Movement Speed.

Duration: 8s

Flash Freeze

Flash Freeze

Tier: 20
Max Points: 1

Passive Skill

Whenever Harlowe deals Cryo Damage with an Action Skill, she gains a chance to Freeze that enemy.

Duration: 8s

Freeze Frame

Freeze Frame

Tier: 25
Max Points: 1

Passive Skill

Harlowe's Guns deal Bonus Cryo Damage for every enemy she has in Stasis.
This effect can stack.

Max Stacks: 10

Heat Sink

Heat Sink

Tier: 20
Max Points: 5

Passive Skill

Whenever Harlowe Freezes an enemy, she gains increased Action Skill Cooldown Rate.

Duration: 8s

Negative Entropy

Negative Entropy

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Gun Handling. This bonus is Doubled while an enemy is in Stasis.

Triple Point

Triple Point

Tier: 25
Max Points: 1

Passive Skill

Whenever Harlowe deals non-Cryo Damage to an Entangled enemy, she deals Bonus Cryo Damage to that enemy.
If she deals Cryo Damage to an Entangled enemy, she deals increased bonus Damage.

Bonus Cryo Damage: +15% of Non-Cryo Damage Dealt
Bonus Cryo Damage: +30% of Cryo Damage Dealt

Stun Lock

Stun Lock

Tier: 25
Max Points: 1

Passive Skill

Whenever Harlowe Critically Hits an enemy, she briefly puts that enemy into Stasis.
This form of Stasis lasts for a short duration, or until the enemy is shot again.

Cooldown: 10s

Periodic Table Flip

Periodic Table Flip

Tier: 5
Max Points: 5

Passive Skill

Harlowe gains increased Elemental Damage, Status Effect Application Chance, and Cryo Effectiveness.

Precision Engineering

Precision Engineering

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Critical Hit Damage.

Too Coolant for Schoolant

Too Coolant for Schoolant

Tier: 10
Max Points: 5

Passive Skill

Whenever Harlowe deals Cryo Damage, gain increased Action Skill Cooldown Rate.

Duration: 4s

Cryodynamics

Cryodynamics

Tier: 10
Max Points: 3

Passive Skill

Harlowe gains increased Cryo Damage.