Perpetual Engine is an augment entanglement skill on branch 3 of Harlowe's Cosmic Brilliance skill tree in Borderlands 4.

Effects

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.

• Damage Reduction per Entangled enemy: +7%
• Action Skill Duration: +7% per Entangled enemy