Flux Generator is the Action Skill of Harlowe's Cosmic Brilliance skill tree in Borderlands 4.

Effects

Harlowe throws her Flux Generator in front of her, which projects an Energy Field, dealing Cryo Damage over time and Entangling enemies.

Allies inside the Energy Field gain Overshield.

Press Action Skill to pick up your Flux Generator and toss it again.

Change History

• The October 23rd, 2025 patch fixed this skill to properly scale the grenades generated when combined with the Annihilation skill.
• The April 30th, 2026 patch updated this skill to consume less Action Skill Duration when activated.