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Cryo Stasis Harlowe Build
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Borderlands 4
Harlowe Leveling Build
☆ How Rush Saved Mercenary Day (Bounty Pack 1)
★ 12 active SHiFT Codes as of December 4, 2025
☆ Black Market Location
★ Elemental Weakness Chart
☆ Legendary Weapons
★ Builds: Vex | Amon | Rafa | Harlowe
This is a green build guide for Harlowe the Gravitar with great AoE Damage and Support potential in Borderlands 4. See the best green build, skills, weapons, guns, and gear to use for Harlowe, along with a leveling guide and character playstyle here!
| All Harlowe Guides | ||
|---|---|---|
| Best Builds | Cosmetics | Skill Trees and Voice Actor |
| Leveling Build | Boss Farm Build | Cryo Stasis Build |
Harlowe Leveling Build Best Skills
Best Action Skill
| Action Skill |  Flux Generator |
|---|---|
| Skill Tree: Cosmic Brilliance | |
For the best Harlowe build, the Cosmic Brilliance skill tree with the Flux Generator is a great choice, as it deals AoE damage and applies status effects to enemies caught in its radius, while also shielding, healing, and buffing allies who stay inside. When used at the right time, the Flux Generator can easily turn the tides of battle, be it with regular mobs or with badasses.
Best Passive Skills
Cosmic Brilliance
Creative Bursts
 | |||
| Skill Tree | Priority Skills | ||
|---|---|---|---|
 Cosmic Brilliance |  Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.  Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.  Mass Function Harlowe and her allies gain increased Reload Speed for every Entangled enemy.  Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.  Resonance Cascade Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage. This effect can stack.  Confirmative Reality Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.  Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.  Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.  Runaway Reaction Harlowe gains increased Status Effect Chance. Whenever Harlowe applies a Status Effect to an enemy, it becomes Entangled. | ||
 | |||
| Skill Tree | Priority Skills | ||
|---|---|---|---|
 Creative Bursts |  Fuzzy Math Harlowe gains increased Status Effect Chance.  Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.  Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate. | ||
The best skills for the Leveling Build revolve around maximizing Action Skill Cooldown and Damage, as well her Flux Generator's healing to increase Harlowe's survivability.
The passive skills you get from the Creative Bursts Tree will help increase Harlowe's Status Effect Chance, which in turn improves her Action Skill Cooldown Rate. It will also buff her Elemental Damage and Status Effect Damage.
Recommended Skill Progression
| Recommended Skill Progression | |||
|---|---|---|---|
|
Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Lvl 2 |
Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Lvl 3 |
Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Lvl 4 |
Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Lvl 5 |
|
Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Lvl 6 |
Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Lvl 7 |
Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Lvl 8 |
Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Lvl 9 |
|
Mass Function Harlowe and her allies gain increased Reload Speed for every Entangled enemy.
Lvl 10 |
Mass Function Harlowe and her allies gain increased Reload Speed for every Entangled enemy.
Lvl 11 |
Confirmative Reality Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.
Lvl 12 |
Confirmative Reality Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.
Lvl 13 |
|
Confirmative Reality Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.
Lvl 14 |
Resonance Cascade Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage. This effect can stack.
Lvl 15 |
Resonance Cascade Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage. This effect can stack.
Lvl 16 |
Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Lvl 17 |
|
Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Lvl 18 |
Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Lvl 19 |
Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Lvl 20 |
Decoherence Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Lvl 21 |
|
Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Lvl 22 |
Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Lvl 23 |
Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Lvl 24 |
Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Lvl 25 |
|
Feedback Loop Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Lvl 26 |
Runaway Reaction Harlowe gains increased Status Effect Chance. Whenever Harlowe applies a Status Effect to an enemy, it becomes Entangled.
Lvl 27 |
Fuzzy Math Harlowe gains increased Status Effect Chance.
Lvl 28 |
Fuzzy Math Harlowe gains increased Status Effect Chance.
Lvl 29 |
|
Fuzzy Math Harlowe gains increased Status Effect Chance.
Lvl 30 |
Fuzzy Math Harlowe gains increased Status Effect Chance.
Lvl 31 |
Fuzzy Math Harlowe gains increased Status Effect Chance.
Lvl 32 |
Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.
Lvl 33 |
|
Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.
Lvl 34 |
Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.
Lvl 35 |
Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.
Lvl 36 |
Elementary Harlowe gains increased Elemental Damage and Status Effect Damage.
Lvl 37 |
|
Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.
Lvl 38 |
Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.
Lvl 39 |
Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.
Lvl 40 |
Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.
Lvl 41 |
|
Test Subjects Whenever Harlowe applies a Status Effect to an enemy, she gains increased Action Skill Cooldown Rate.
Lvl 42 |
Resonance Cascade Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage. This effect can stack.
Lvl 43 |
Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Lvl 44 |
Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Lvl 45 |
|
Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Lvl 46 |
Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Lvl 47 |
Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Lvl 48 |
Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Lvl 49 |
|
Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Lvl 50 |
|||
Early on, prioritize Mains Hum and Momentum in the Cosmic Brilliance tree for both survivability and damage, as well as Mass Function and Neutron Decay for faster reload speeds and improved Gun Damage, respectively. Round this off with points in Resonance Cascade to improve your Flux Generator's damage, as well as Confirmative Reality for Active Skill Cooldown reduction to you and your allies.
Once you unlock the next branches, focus on the first branch and get Decoherence for the increased damage to Entangled enemies, Feedback Loop for numerous Action Skill buffs when Entangling enemies, and Runaway Reaction to apply Entanglement even without the Action Skill easily.
Once you get the needed passives, max out Fuzzy Math, Elementary, and Test Subjects in the Creative Bursts tree (Red Tree). Fuzzy Math gives Status Effect Chance, Elementary improves Harlowe's Elemental Damage and Status Effect Damage, and Test Subjects increases her Action Skill Cooldown Rate whenever she applies a Status Effect on enemies.
Best Augment
| Lvl 6 | Lvl 16 |
|---|---|
 Coronal Mass Ejection
|
 Unified Theory
|
Starting at level 6, equip the Coronal Mass Ejection Augment to deactivate the Elemental Resistance of all enemies, as well as to increase the Status Effect Chance of all allies inside the Flux Generator.
Once you reach level 16, however, swap this out for the Unified Theory Augment, as it provides increased Action Skill Damage based on how many enemies and allies are inside the Flux Generator.
Best Capstone
 Potential Transference
|
||
| Tree |
Cosmic Brilliance
(Branch 1) |
|
|---|---|---|
| Effect | ||
| Charge Skill. Whenever Harlowe relocates her Flux Generator, it Teleports to a location in her crosshairs, consuming a Charge and creating a Shock Burst that deals Shock Damage to enemies inside it, grants a free Second Wind to allies, and Heals allies within the Flux Generator. | ||
For the capstone, Potential Transference is a must. Not only does it allow you to easily aim where you want to relocate your Flux Generator, but it now also deals Shock damage whenever you relocate it. Additionally, relocating the Flux Generator grants Second Wind to allies, and Heals allies who are within the Generator's range.
Harlowe Leveling Build Best Equipment
| Jump to a Section! | |||||
|---|---|---|---|---|---|
| Weapons | Repkit | Ordnance | |||
| Class Mod | Shield | Enhancement | |||
| Firmware | |||||
Best Weapon
Best Legendary Weapon: Ohm I Got
| Legendary | Gun Overview |
|---|---|
 Ohm I Got
|
Type: Submachine Gun Manufacturer: Maliwan Energy Transfer: When Energy Shield is active, grants +50% Damage by consuming the Shield's energy instead of Ammo. When Overshield is also active, Energy Shield will not deplete. |
Ohm I Got is the best weapon for Harlowe in this build thanks to its synergy with Harlowe's Flux Generator. Because the Flux Generator provides Overshields, you will be able to enjoy Energy Transfer's effects, providing both 50% increased damage and unlimited ammo as long as you have an Overshield.
Best Weapon Type for Harlowe: Submachine Gun
The fast rate of fire of Submachine Guns makes it a perfect fit for Harlowe as her skills synergize well with elemental damage and Status Effects.
Best Manufacturer for Harlowe: Maliwan
Maliwan is the best manufacturer when it comes to elemental weapons, so getting a Maliwan Submachine gun for Harlowe is a must. For this build, try to find a Radiation Maliwan Submachine gun, as that will synergize with the selected Passive Skills. If you can get the Rocket Scientist Gravitar Class Mod, then getting a Shock Maliwan Submachine gun works as well.
Best Repkit
| Repkit | Repkit Effect |
|---|---|
 AF1000 |
Time Dilation: The Repkit's Duration is increased by +100% and its Cooldown Duration is decreased by -50%. |
AF1000 is the best Repkit for Harlowe thanks to its increased duration and decreased Cooldown Duration. Rather than her main source of healing, however, this acts more as a backup healing source, as her Flux Generator is capable of providing large amounts of healing and Shields.
Best Ordnance
| Ordnance | Unique Trait |
|---|---|
 Jelly |
Self-Replicating Legendary Trait |
The Jelly is the best Ordnance for Harlowe thanks to its Self-Replicating trait that lets it bounce around as long as it hits a solid surface, with each bounce causing a small explosion. This makes it perfect for quickly applying Status effectson enemies thanks to its multiple explosions, as well as taking care of mobs of smaller enemies.
Best Class Mod
Bio-Robot is the best Class Mod for this Harlowe Build as it creates Cryo and Radiation Hazards whenever Harlowe Entangles enemies. These Hazards can apply Status Effects, which in turn can help Entangle even more enemies.
List of All Legendary Class Mods
Best Shield
| Shield | Unique Trait |
|---|---|
 Watts 4 Dinner |
Overshield Eater: When Energy Shield is active, enemies have a 12% chance to drop an Overshield when hit. When Overshield is also active, grants +25% Shock Damage. |
Watts 4 Dinner is the best shield for Harlowe thanks to its bonus Shock Damage whenever she has an Overshield. As she can get Overshields from both her Flux Generator and the shield's own Overshield Eater, she will be able to keep the Bonus Shock Damage active easily.
Best Enhancement
| Enhancement | Effects |
|---|---|
| Maliwan Enhancement |
・Infuser - On kill, Guns with Maliwan-licensed parts spread their active Status Effect to up to 3 nearby targets. ・Synthesizer - Guns with Maliwan-licensed parts have +25% Status Effect Damage. |
As you want to spread Status Effects to easily Entangle enemies, the Infuser Enhancement is the best Enhancement to use as it spreads Status Effects whenever you kill an enemy. Alternatively, you can also use the Synthesizer Enhancement as it increases the Status Effect Damage you deal.
Best Firmware
GOOJFC is the best Firmware to equip on Harlowe as it provides up to +30% Action Skill Cooldown Rate and +15% Action Skill Damage. As you want to use your Flux Generator more often, GOOJFC will help you do just that.
Harlowe Leveling Build Best Specializations
| Specialization | Effect |
|---|---|
 Contamination
|
Critical Hits grant increased Status Effect Application Chance. |
 Compounding Afflictions
|
Enemies take increased Damage for each Status Effect applied to them. |
 Now With Caffeine
|
Reduce Action Skill Cooldown whenever a Repkit is activated. |
 A Honed Mind
|
Action Skills gain a chance to Critical Hit enemies, and also gain increased Action Skill Critical Hit Damage. |
We recommend taking the following Specializations, investing ten points each in Brute and Sharpshooter to unlock the Killer branch. Once Killer is unlocked, invest ten points in it to unlock both Contamination and Compounding Afflictions.
Afterward, invest ten points in Runner to unlock the Daredevil branch. Once Daredevil is unlocked, invest twenty points in it to unlock Now With Caffeine and A Honed Mind.
Once you have the needed Passives, invest more Specialization points into Killer for more Critical Hit and Status Effect Damage and Daredevil for better Action Skill Cooldown Rate.
Harlowe (Gravitar) Levelling Guide
Always Deploy the Flux Generator
The Flux Generator not only provides shields to Harlowe and other allies inside it, but it also damages any enemy that is caught in its radius.
As such, always start fights with the Flux Generator, as it will provide you with both survivability and damage that will help you deal with fights easily.
Look for Radiation Grenades
Radiation Grenades will help increase your total damage output, as this build synergizes well with Radiation damage.
Try to farm a Radiation Jelly Legendary Ordnance to easily deal Radiation damage. Alternatively, try to look for Radiation Order Grenades as these grenades will automatically seek enemies, removing the need to precisely aim your grenade throws.
Complete Side Missions and Bounties
To farm EXP efficiently, accept Side Missions and Bounties whenever possible, instead of just aimlessly wandering the map.
Side Missions and Bounties reward you with EXP upon completion, and most of these require you to fight various enemies, allowing you to gain EXP from multiple sources per mission.
Farm Mobs for More EXP
Other than completing Side Missions and Bounties, you can also earn a lot of EXP by farming mobs you run into during your travels across Kairos. Additionally, you can also participate in World Events and Points of Interest that involve defeating a lot of enemies, such as Drill Sites!
Harlowe Leveling Build Build Playstyle
AoE Damage and Teamwide Buffs
With the Cosmic Brilliance skill tree, this build increases the buffs, healing, and shielding that you can provide your allies, while also improving Action Skill Duration and minimizing Action Skill Cooldown to not only increase the uptime of the buffs, but also of the AoE damage that comes with the Flux Generator.
Not Optimized for Boss Farming
Although this build can be used to fight bosses, it is not optimized for it and may take you some time if you try to fight bosses using it. If you plan to farm bosses as Harlowe, consider checking out our designated Boss Farming build for Harlowe!
CHROMA Radiation Harlowe Boss Farm Build
Borderlands 4 Related Guides
Best Builds for Each Vault Hunter
All Character Builds
| Character | Build |
|---|---|
 Vex |
|
 Rafa |
|
 Amon |
|
 Harlowe |
Best Leveling Build |
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Harlowe Leveling Build
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