Rainbow Vomit Is Borderlands 4’s Most Chaotic Gun—Here’s How to Get It

Getting Rainbow Vomit isn’t as simple as opening a loot chest. You’ll need to complete a specific questline tied to the Electi faction in the Carcadia Burn region. The weapon drops from Leader Willem, a boss you’ll face after finishing a series of missions that gradually unlock access to his stronghold.

Here’s the mission path you’ll need to follow:

1. Enter the Electi Pt. 1

Talk to Leader Kassandra in Carcadia after defeating Callis. She’ll send you on a bizarre errand to collect “food” from a Creep nest. Spoiler: it’s bullets.

2. Enter the Electi Pt. 2

Work with Willem to place five system relays around the settlement. The locations are scattered but manageable. Once you’re done, return to Willem for your reward.

3. The Council Divided

Meet with Levaine in the Leader’s chamber. You’ll investigate stolen weapons and track them to a base in the Burn. Grab the Echo Log and prepare for a fight.

4. A Traitor Within

This mission leads you deeper into Willem’s territory. You’ll destroy three ships using bombs hidden around the base. Look near wrecked engines and tangled pipes.

5. The Mole’s Gambit

Complete this mission to unlock The Excrucible, where Willem awaits. Defeat him, and you’ll have a chance to earn Rainbow Vomit as a drop.

Farming Tips

Once you’ve unlocked Willem, you can farm him using Moxxi’s Big Encore, a replay system that lets you respawn bosses. Rainbow Vomit is part of his loot pool, so you may need to run the fight a few times before it drops. The weapon can also appear as a world drop, but the odds are significantly lower.

If you’ve finished the main campaign, check your Wildcard Missions. These weekly challenges sometimes feature Rainbow Vomit as a guaranteed reward, especially during elemental-themed events.

Why It’s Worth the Grind

Rainbow Vomit isn’t just flashy—it’s effective. The weapon’s Colour Spray effect launches three elemental droplets per shot, and the elements rotate randomly. Some versions deal fire, corrosive, and shock damage simultaneously, making it ideal for mixed enemy types.

Because it’s a Jakobs shotgun, it also benefits from critical hit ricochets, allowing you to spread damage across groups. Pair it with gear that boosts Status Effect Chance and Elemental Damage, and you’ll be unstoppable.

Build Synergy

If you’re running a build focused on elemental chaos, Rainbow Vomit fits perfectly. It works well with Vault Hunters who specialize in splash damage, elemental stacking, or crit-based mechanics. Try pairing it with relics that boost elemental radius or class mods that increase elemental duration.

Final Thoughts

Rainbow Vomit is more than just a meme-worthy name—it’s one of the most versatile and destructive weapons in Borderlands 4. It takes effort to unlock, but once you have it, you’ll understand why it’s considered top-tier. Whether you’re clearing mobs, tackling raid bosses, or just showing off in co-op, this shotgun delivers chaos in every shot.

For more gaming content, visit Total Apex Gaming.

For more Borderlands 4-related content, visit Total Apex Gaming: Borderlands 4