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Borderlands 4

Cosmic Brilliance Skill Tree Guide

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☆ 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

Borderlands 4 - Cosmic Brilliance Skill Tree Guide

Cosmic Brilliance is one of Harlowe's skill trees in Borderlands 4. See a list of all Cosmic Brilliance skills, as well as the playstyle of this skill tree.

List of Contents

List of Cosmic Brilliance Skills

Skills by Type
Capstones Passives Augments

Cosmic Brilliance Capstones

Skill Effect
Potential Transference Icon Potential Transference
(Branch 1) 		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.
Violent Horizon Icon Violent Horizon
(Branch 2) 		Harlowe's Flux Generator occasionally shoots Radiation Projectiles at nearby enemies outside of its radius. If these Projectiles Irradiate an enemy, the Flux Generator then drags them within its radius. Retrigger: Harlowe's Flux Generator creates a Singularity burst that drags in nearby enemies and increases Action Skill Power.
Group Study Icon Group Study
(Branch 3) 		Harlowe spawns a HALO Sidekick for each ally instead of her Flux Generator. HALO Sidekicks automatically fly to each ally and hover near them, granting increased Gun Damage, Fire Rate, and Reload Speed. Action Skill Retrigger: Overload Harlowe's HALO Sidekicks to increase their effects. This effect stacks. While Overloaded, Harlowe's Action Skill Duration drains faster.

Cosmic Brilliance Passives

Skill Effect
Absolute Zero Icon Absolute Zero Whenever Harlowe Freezes an enemy, she receives a Stack of Zero Point. For every Stack of Zero Point, her Action Skill Duration freezes enemies for a short time.
Action at a Distance Icon Action at a Distance Whenever Harlowe applies a Status Effect to an enemy, she gains a chance to apply that Status Effect to each Entangled enemy.
Confirmative Reality Icon Confirmative Reality Whenever Harlowe shoots an Entangled enemy, she and all allies restore a portion of their Action Skill Cooldown.
Creative Overflow Icon Creative Overflow Harlowe deals increased Gun Damage based on her Overshield. The more Overshield she has, the bigger the bonus.
Heat Death Icon Heat Death Harlowe gains increased Cryo Efficiency.
Mains Hum Icon Mains Hum Harlowe gains increased Maximum Shield Capacity and increased Maximum Overshield Capacity.
Mass Function Icon Mass Function Harlowe and her allies gain increased Reload Speed for every Entangled enemy.
Momentum Icon Momentum Whenever Harlowe Entangles an enemy, she and her allies deal increased Critical Hit Damage.
Neutron Decay Icon Neutron Decay Whenever Harlowe Irradiates an enemy, she gains increased Gun Damage. This effect can stack.
Personal Observation Icon Personal Observation Harlowe deals increased Melee Damage and her Melee Attacks gain a chance to Entangle enemies.
Resonance Cascade Icon Resonance Cascade Whenever Harlowe deals Radiation Damage to an enemy, she gains increased Action Skill Damage. This effect can stack.
Blue Shift Icon Blue Shift
(Branch 1) 		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 Icon Decoherence
(Branch 1) 		Harlowe deals increased Damage with all sources to Entangled enemies. Enemies inside of her Flux Generator take further increased Damage.
Feedback Loop Icon Feedback Loop
(Branch 1) 		Whenever Harlowe Entangles an enemy, she gains increased Action Skill Damage, Action Skill Duration, and Action Skill Cooldown Rate. This effect can stack.
Latent Charge Icon Latent Charge
(Branch 1) 		Harlowe deals Bonus Damage with Guns, Melee Attacks, and Action Skills while she has Overshield. The more Overshield she has, the bigger the bonus.
Runaway Reaction Icon Runaway Reaction
(Branch 1) 		Harlowe gains increased Status Effect Chance. Whenever Harlowe applies a Status Effect to an enemy, it becomes Entangled.
Critical Funding Icon Critical Funding
(Branch 2) 		Whenever Harlowe Critically Hits an enemy, she gains a chance to Entangle it, and Refills a portion of her Gun's Magazine.
Exposed Core Icon Exposed Core
(Branch 2) 		While her Shield is down, Harlowe gains increased Status Effect Chance.
Gamma Ray Burst Icon Gamma Ray Burst
(Branch 2) 		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 Harlowe's Certainty Principle
(Branch 2) 		Harlowe gains increased Gun Handling, which is further increased with every enemy in her Flux Generator.
Jaunt Icon Jaunt
(Branch 2) 		Press and hold Melee Attack to make Harlowe swap places with her Flux Generator.
Meltdown Icon Meltdown
(Branch 2) 		Harlowe's Critical Hits with Guns deal Bonus Radiation Damage.
Accretion Icon Accretion
(Branch 3) 		Harlowe and her allies gain Lifesteal against Entangled enemies.
Annihilation Icon Annihilation
(Branch 3) 		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.
Distribution Function Icon Distribution Function
(Branch 3) 		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.
Excited State Icon Excited State
(Branch 3) 		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.
Pencils Down Icon Pencils Down
(Branch 3) 		While Harlowe's Action Skill is Cooling Down, she grants herself and her allies increased Reload Speed and Fire Rate.
Refraction Icon Refraction
(Branch 3) 		Harlowe and her allies gain Ricochet Chance against Entangled enemies. Critical Hits Double this chance. Ricochets have Reduced Damage.

Cosmic Brilliance Augments

Skill Effect
Blue Giant Icon Blue Giant Harlowe's Flux Generator gains increased Radius. Additionally, whenever she retrieves Flux Generator, she creates a Cryo Hazard where her Flux Generator was located, and a Radiation Hazard wherever she next places her Flux Generator. Only one of each of these Hazards may be active at a time.
Coronal Mass Ejection Icon Coronal Mass Ejection Enemies inside Harlowe's Flux Generator lose all Elemental Resistances. Harlowe and her allies inside her Flux Generator gain increased Status Effect Chance.
Unified Theory Icon Unified Theory
(Branch 1) 		Harlowe's Flux Generator gains increased Action Skill Damage. This effect is increased based on how many Allies and Enemies are inside of her Flux Generator.
Nuclear Winter Icon Nuclear Winter
(Branch 2) 		Whenever Harlowe and her allies are inside the Flux Generator's Radius, they deal Bonus Cryo Damage. Whenever Harlowe and her allies leave the Flux Generator's Radius, they instead deal Bonus Radiation Damage for a Duration. Whenever Harlowe inflicts Cryo or Radiation Status Effects, that enemy becomes Entangled.
Perpetual Engine Icon Perpetual Engine
(Branch 3) 		When Harlowe activates her Flux Generator, she gains Damage Reduction and increased Action Skill Duration for each Entangled enemy and each additional enemy she Entangles while her Action Skill is active.

Cosmic Brilliance Action Skill and Playstyle

Flux Generator

Support Allies with Heals and Shields

This skill tree is recommended for players who wish to play a supportive role by providing teammates with heals and shields, making it ideal for party play.

Borderlands 4 Related Guides

Skills

List of All Skills

All Skills by Tree

Vex
The Fourth Seal Vexcalation Here Comes Trouble
Amon
Calamity Vengeance Cybernetics
Rafa
People Person Remote Agent This Year's Gimmick
Harlowe
Creative Bursts Seize the Day Cosmic Brilliance

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