Infernal Iron - a special resource scattered across various locations in Baldur's Gate 3 that you need to find as part of the quest "The Hellion's Heart." This quest is available at the beginning of Act 1.

In this guide, we will tell you about all the places where you can find Infernal Iron to make your search easier and faster.

What Is Infernal Iron Used For In Baldur's Gate 3

This resource is needed by Karliah as part of her quest. Inside her chest is a special mechanism that stabilizes Infernal Iron. Without it, the engine can stop, and Karliah may die. The tiefling cannot do without your help.

How to Start the "The Hellion's Heart" Quest

To start, you need to accept Karliah into your party. You can meet her during the "Hunt the Devil" quest in the Risen Road location. Within the quest, defeat the paladins and talk to Karliah, who will explain how her internal mechanism works. Karliah will also mention Infernal Mechanic Dammon, who can use Infernal Iron and assist her.

The "The Hellion's Heart" quest will start immediately after the dialogue is completed.

Where to Find Infernal Iron

Below are all the locations where you can find Infernal Iron for Karliah's quest.

Extinct Village

From the Extinct Village, head north. Approach the house, go through it, and head right to the adjacent building. In the center of the room, there will be a pit - descend to the basement using Karliah's ability.

The chest you need will be located below, at coordinates X: -435; Y: -373.

Zentarim Hideout

Head to Waukeen's Rest and turn left. Enter the house at coordinates X: -111; Y: 606. Talk to the mage, pass the check, and descend into the hideout. At coordinates X: 297; Y: -179, there will be a gate behind which you'll find the next piece of Infernal Iron.

Grymforge

Go to the Underground Passage and descend in a boat to Grymforge. Go up the right staircase, then up again to the right, and talk to Kith the Stonemason near coordinates X: -659; Y: 378. Pass three checks, and Kith will give you Infernal Iron as a gift.

Shattered Sanctum

You can enter this location during a quest in which you previously saved Goblin Sazza. Return to the sanctum and open the vault at coordinates X: 296; Y: 63.

Masons' Guild

To enter the Masons' Guild, you must first go through the Moonrise Towers and then into the The Shadow Curse. We have a separate quest guide on how to enter Moonrise Towers. Afterward, head northwest to coordinates X: -98; Y: 18.

Gauntlet of Shar

From the Masons' Guild, continue onward and talk to Raphael. Descend into the Gauntlet of Shar's underground next to him, go down the left corridor to a hall with a vault containing Infernal Iron.

Yurgir

Yurgir is a fairly strong enemy you'll encounter in the Gauntlet of Shar. Prepare your party, healing and protective potions to secure victory. You can collect Infernal Iron from Yurgir's body.

How to Use Infernal Iron

Return to the Emerald Grove and talk to Dammon. Once you hand over all the collected resources to the mechanic, the quest will be completed.