How to Get Undead Eye Class Mod in Borderlands 4

If you play Borderlands 4 and use Vex (the Siren class) often, the Undead Eye class mod is one of the most powerful tools you’ll want in your arsenal. This legendary class mod unlocks extra effects tied to sniper rifles, boosting your damage and survivability. But it’s not easy to get — you’ll need to satisfy certain story requirements, hunt down a specific boss, and be ready to farm. In this guide, I’ll walk you step by step through how to get the Undead Eye class mod in Borderlands 4.

The Undead Eye is a legendary class mod exclusive to Vex. When equipped:

• Killing an enemy with a sniper rifle automatically triggers Blood Shot.
• Critically hitting an enemy with a sniper rifle has a 33% chance to trigger Blood Shot again.

This gives you extra damage, sustain, and synergy with builds that emphasize sniping and crits.

Because of its power, it’s a highly sought mod for endgame builds. But you can’t just find it anywhere — you have to hunt it.

Prerequisites: What You Must Do First

Before you can face the boss that drops Undead Eye, you need to meet some in-game requirements:

1. Progress in the main story until you finish the mission “His Vile Sanctum.” Without this, you won’t unlock access to the boss area where it drops.
2. You also must have unlocked the Terminus Range region and the Umbral Foundry sub-area within it.
3. Make sure you can fast travel to The Nightcap Safehouse, which is the nearest safehouse to the boss location.

Once you’ve passed these checkpoints, you can attempt to farm the mod.

Where to Farm Undead Eye: Boss & Location

• The Undead Eye mod drops from the Vile Lictor boss.
• Vile Lictor is found in Umbral Foundry in the Windspear area of Terminus Range.
• After finishing “His Vile Sanctum,” you can fast travel to the region and find Vile Lictor’s arena.
• The mod is not guaranteed — it’s part of the boss’s loot pool, so you’ll likely need multiple attempts.

Step-by-Step Guide: How to Get Undead Eye

Here’s a clear walkthrough:

1. Finish “His Vile Sanctum” mission in the story.
2. Travel to Terminus Range → Windspear → Umbral Foundry.
3. Move through the Foundry until you reach Vile Lictor’s arena.
4. Prepare your build:
   • Use strong sniper rifles with high base damage and crit potential.
   • Equip gear that boosts critical hit chance, damage, or survivability.
   • Consider shields with good capacity and regeneration, veteran gear, etc.
5. Fight Vile Lictor, defeat it, and check the loot.
6. If the Undead Eye mod isn’t dropped, respawn the boss (for example, via a respawn station or machine, often something like “Moxxi’s Big Encore”) and try again.
7. Repeat until the mod drops.

It may take many runs, so patience is important.

Tips to Improve Your Odds

To make your farming more effective, follow these tips:

• Optimize gear: Use items that raise critical hit rate, damage multipliers, and survivability. The better your gear, the faster you can run the boss and the safer you’ll be.
• Use elemental damage wisely: Some bosses are weak to shock, corrosive, or other elements. Study Vile Lictor’s resistances and choose your sniper accordingly.
• Clear surrounding enemies first: Don’t let mobs interfere in the boss fight.
• Learn the boss’s pattern: Vile Lictor will have telltale animations or phases. Avoid its strongest attacks, hit weak spots, and manage positioning.
• Be patient: Legendary drops like Undead Eye are rare. You might need many runs.
• Switch playstyle: If one build struggles, try a different sniper build or supportive gear to survive more and deal more damage.
• Campaign scaling: The loot you get will scale with your level. Try farming when you’re at high level to get a more useful roll.

Why the Undead Eye is Worth Farming

Yes, it’s a grind. But once you finally get it, the Undead Eye class mod can elevate your Vex game dramatically:

• It rewards precision by converting kills/crit hits into bonus effects.
• It synergizes well with sniper-based builds, letting you chain kills with lifesteal or extra damage.
• For endgame content, having such a powerful mod can make the difference in tougher fights.

If you’re committed to Vex and love a sniper playstyle, this mod is a top priority.

Possible Drawbacks & Considerations

• You may farm for hours before it drops — don’t expect it quickly.
• The roll (attributes, bonuses) may not always suit your build; you might want to farm until you get a “perfect roll.”
• If you change your playstyle away from sniping, it becomes less valuable.
• In co-op, loot sharing might reduce your personal drops.