Updated: Oct 06, 2026

Borderlands 4Plague Engineer

Let's put your immune system to the test.

Content
Base Game
Class
Loveless
Rarity
Legendary
Manufacturer
Skill Bonuses
Established Gameplay Loop
Cat 5
It's Super Effective
When it Rains

Plague EngineerAll Details

Copy Plague Engineer Code

Plague Engineer - About

The Legendary Loveless Class Mod Plague Engineer comes from the Borderlands 4 Base Game.

Plague Engineer - Unique Ability

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.

Loveless' Plague Engineer Class mod always comes with the Stat:

+40% Status Effect Application Chance

Plague Engineer - Boosted Skills

‍Legendary and Epic Class Mods get 7 Bonus Points that are distributed randomly. A Skill's maximum Bonus Points depend on its original maximum.

5-Point Skills: 0 to +5 points
‍3-Point Skills: 0 to +3 points
‍1-Point Skills: 0 to +1 points

Established Gameplay Loop

Tier: 0

Max Points: 5 ➜ 10

Cat 5

Tier: 10

Max Points: 5 ➜ 10

It's Super Effective

Tier: 15

Max Points: 5 ➜ 10

When it Rains

Tier: 20

Max Points: 3 ➜ 6

Plague Engineer - Stats

In Borderlands 4 Epic Class Mods get 3 random Stats out of these 6 Categories. Legendary Class Mods have 1 random and 1 fixed Stat listed in the About Tab.
Each Stat can appear only once and all are equally common with a 3.125% Chance (1 in 32).

Universal Stats

+26% Damage Dealt
+26% Move Speed
+46% Splash Damage
+46% Crit Damage
+80% Melee Damage
+13% Melee Crit Chance

Survivability Stats

+14,586 Max-Health
+12,502 Max-Shield
+313 Health Regen/s
+33% Damage Reduction
+66% Energy Shield Regen Rate

Weapon Stats

+40% Gun Damage
+26% Fire Rate
+32% Reload Speed
+13% Gun Crit Chance
+60% AR Damage
+60% Pistol Damage
+60% Shotgun Damage
+60% SMG Damage
+60% Sniper Damage

Ordnance Stats

+60% Ordnance Damage
+33% Ordnance Cooldown Rate
+13% Ordnance Crit Chance

Elemental Stats

+33% Elemental Damage
+53% Kinetic Damage
+40% Status Damage
+40% Status Chance

Skills Stats

+60% Skill Damage
+13% Skill Crit Chance
+80% Action Skill Damage
+60% Action Skill Duration
+33% Action Skill Cooldown Rate

Plague Engineer - Changelog

Plague EngineerHow to get it?

Base Game
General Farming Guidance

To collect and equip the Legendary Plague Engineer, you need to own the BL4 Base Game.

Base Game Items in Borderlands 4 are often obtainable from many sources, including those in DLCs. Here’s your quick start guide:

Farming Preparations

Identify the Best Source: The Sources below are generally ranked from best to worst. Make sure to complete any required quests and be aware of Source^Restrictions.
Locate the Source: Make sure you have unlocked the Location.
Equip Your Character: Equip your character to easily overcome enemies.
Set Spawn Point: Locate the nearest Save Station to use as your spawn point.

Bonus Tips

Combine Runs: Get more loot per run by integrating nearby sources into your farming route.
Track Progress: Track your runs to more precisely predict drops and more clearly monitor progress. Additionally, time your runs to see how tweaks affect your farming efficiency.
Speed it up: Explore shortcuts and boost your movement speed to minimize travel time. Also, aim to shorten your time to kill with higher DPS or big damage bursts.
Realistic Expectations: Be patient and persistent when farming. Despite precise, verified drop rates, your actual runs might exceed or fall short of inferred expectations.