Chiselbella Location and Drops in Borderlands 4

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Borderlands 4 Chiselbella Boss Mercurious Drop and Combat with Shotgun

Published Feb 26, 2026, 5:00 PM EST

When it comes to Borderlands 4, players want more and more legendary items to maximize their build potential. Well, the second bounty pack for the game has delivered multiple new legendary items that you can get your hands on.

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Of course, if you want to get the legendary gear from the Legend of the Stone Demon DLC, you can do so by completing the Vault Card, but you can also do it by defeating bosses. One such boss that is optional is Chiselbella.

Let's break down where you can find Chiselbella in the second bounty pack for Borderlands 4, along with every legendary drop this boss has.

Chiselbella Location

Each of the optional bosses in the Legend of the Stone Demon DLC for Borderlands 4 is hidden within the large mine, and you will need to go a bit out of your way if you want to fight them. While navigating this mine, Chiselbella will be the first of the bosses you may come across.

After reaching the Demonhold fast travel station, you will want to follow the northeastern path into the mine until you enter a massive chamber. From here, cross over to the northwestern corner of the chamber.

You should notice a large waterfall in the upper part of the area. If you go through this waterfall, it will lead you down a northern path to another large chamber.

In this second chamber, navigate up the rocks to the north and continue down the path ahead. This will lead you to the area outside the boss chamber, where you can jump down to fight Chiselbella.

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Chiselbella Drops

Borderlands 4 Chiselbella Boss Mercurious Drop

There are two dedicated drops that Chiselbella has in its loot pool. These are the following:

Name

Item Type

Ability

Mercurious	Submachine Gun	Fleet Footed - Increases damage based on the movement speed of the player.
Bubbles	Assault Rifle	Squeaky Clean - The assault rifle shoots elemental bubbles instead of standard ammo.

The first of the weapons dropped by Chiselbella is the Mercurious SMG. This weapon scales its damage based on your movement speed, making it great for those who are playing as Rafa, as he can get massive increases to his movement speed.

You can also combine this weapon with the Risky Boots Firmware for more movement speed and more damage. The other weapon is the Bubbles Assault Rifle.

Instead of shooting normal bullets, this weapon shoots elemental bubbles, making it a rather unique legendary to use during combat.

Tips for Fighting Chiselbella

Chiselbella is a rather annoying boss and is up there with bosses like Sludgemaw and Axemaul for being the most annoying in the game. This is because Chiselbella is constantly moving while in the arena, making it difficult to pin down.

When you enter the boss arena, you will notice that Chiselbella has large crystals on its back. This is similar to other bosses in this DLC, and before you can deal damage to Chiselbella, you will need to destroy the crystals.

There are five groups of crystals, with two being on the front of the boss, two being on the back, and one being on the tail. Once all are destroyed, you should use a fire elemental weapon to take down the boss as its health bar is red.

If you need to be brought up during the fight, multiple smaller enemies are constantly roaming the arena. These enemies are easy to kill and may be needed if the boss turns out to be too much of a pain.