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Borderlands 4 Guide

How to Unlock The Legendary Plague Engineer Loveless Class Mod

Class Mods
Legendary Loot
By Lewis0n
Updated on Sep 11, 2026
Sep 11, 2026

Overview

Plague Engineer is Loveless Class Mod

When Loveless applies a Status Effect, there is a 10% Chance for it to spread to nearby enemy. Contagion has double the Chance to apply.

If there is no enemy to spread to, deal 50% of the Status Effect's Damage immediately.

How To Unlock

Unlock Location:

  • Progress through the (Raid Boss 2) until reaching the Boss
    The Subjugator and Thol The Invincible

Farm Method:

  • Defeat The Subjugator and Thol The Invincible to get a chance at the Plague Engineer.
  • After use the Encore Machine nearby to reset the fight.
  • Repeatedly defeat The Subjugator and Thol The Invincible until the Plague Engineer drops.

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Table of Contents

1. Overview2. How To Unlock3. Comments

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