Infernal Iron is one of the most sought-after crafting materials and quest items in Baldur’s Gate 3. This rare metal, forged in the fires of the Nine Hells, serves two primary purposes: stabilizing the infernal engine in Karlach’s chest and allowing the blacksmith Dammon to forge high-tier heavy armor. Since the game transitions through three distinct acts, missing specific pieces early on can stall companion progression or prevent you from obtaining the Flawed Helldusk gear set.

The role of Dammon and Karlach

Before tracking down every piece of metal, understanding the mechanics of Dammon is essential. Dammon is a Tiefling smith who possesses the unique knowledge required to work with infernal materials. In Act 1, he is found in the Emerald Grove. If the grove is raided or the Tieflings are forced out, he moves to the Last Light Inn in Act 2. By Act 3, he sets up shop in the Forge of the Nine in the Lower City of Baldur’s Gate.

Karlach’s personal quest, "The Hellion’s Heart," requires two specific upgrades using Infernal Iron. The first upgrade allows her to handle physical contact without burning others, while the second further stabilizes her engine, unlocking deeper romance options and combat buffs. Once her engine is serviced, any additional iron you find can be traded to Dammon for the Flawed Helldusk armor set.

Act 1: Early game Infernal Iron locations

In the first act, Infernal Iron is scarce, making early discovery vital for Karlach’s survival. There are four primary locations where this metal can be looted or earned through dialogue.

The Blighted Village Blacksmith’s Basement

This is typically the first piece of iron players encounter. Located west of the Emerald Grove, the Blighted Village is overrun by goblins. Head to the northern house (X:43, Y:434) which served as a forge. Inside, you can find a calcified web covering a hole in the floor or simply use the wooden doors to enter the basement.

Once in the basement, you must locate a high wooden platform accessible by a ladder. On this platform sits a chest. Be cautious: the chest is trapped. It is recommended to use a character with high Sleight of Hand, such as Astarion, to disarm the trap before opening. Inside, you will find a piece of Infernal Iron alongside the blueprints for the Masterwork Weapon quest.

The Shattered Sanctum (Goblin Camp)

Deep within the Goblin Camp lies the Shattered Sanctum. The iron here is hidden in the treasure room directly behind the throne of Dror Ragzlin, the Hobgoblin leader. To access this room, you have several options. You can kill Dror Ragzlin and loot his key, or you can attempt to picklock the heavy iron gates. The Lockpicking DC is 20, which is relatively high for early-game characters. Inside the vault, among piles of gold and magical items, sits a piece of Infernal Iron. If you are following a "good" playthrough, clearing this camp is standard, making the loot easily accessible after the combat ends.

The Zhentarim Hideout

The Zhentarim Hideout is a clandestine base located beneath Waukeen’s Rest. To enter, you generally need to save the Zhentarim caravan survivors from gnolls on the Risen Road to receive a password. Once inside the hideout, navigate to the northern back area where two locked iron gates guard a storage room. These rooms are guarded by several Zhentarim agents and their wolves.

The iron is found in a chest within the room on the right (X:285, Y:-165). These chests are also trapped with grease and fire triggers. If you trigger the trap, the ensuing explosion may not destroy the iron, but it will certainly kill your party and destroy other potential loot. Use "Create or Destroy Water" or a similar spell to mitigate the fire risk if you fail the disarm check.

Grymforge (Stonemason Kith)

In the Underdark, after taking the boat to Grymforge, you can encounter a Duergar named Stonemason Kith (X:-612, Y:380). Unlike most of his kin, Kith is preoccupied with the architecture of the ruins. If you engage him in conversation and pass three consecutive checks (History, Investigation, and Perception), he will be impressed by your observations. As a reward, he gives you a piece of Infernal Alloy. While named "Alloy," Dammon treats this identically to Infernal Iron for both Karlach’s quest and armor crafting. This is the only piece in Act 1 that can be acquired through social interaction rather than theft or combat.

Act 2: Shadow-Cursed Lands and the Gauntlet of Shar

As the story moves into the Shadow-Cursed Lands, Infernal Iron becomes slightly more specialized, sometimes appearing under names like "Infernal Metal."

The Reithwin Mason’s Guild

Located in the cursed town of Reithwin, just west of the Last Light Inn, is the Mason’s Guild. This area is often filled with shadows and wraiths. On the main floor of the guild, sitting on a stone workbench (X:-105, Y:18), you can find a piece of Infernal Iron sitting in the open. It does not require lockpicking, but you will likely have to fight the nearby shadows to claim it safely.

The Gauntlet of Shar (Balthazar’s Vault)

Inside the Gauntlet of Shar, near the area where you encounter the necromancer Balthazar, there is a vault room. To the north of the main corridor leading to his laboratory, there is a door with a very high DC (often 30) or requiring a specific key. Inside an opulent chest (X:-821, Y:-752) lies a piece labeled as "Infernal Metal." This functions exactly like Infernal Iron and is essential if you missed pieces in Act 1.

Yurgir the Orthon

Also within the Gauntlet of Shar, you will encounter the Orthon, Yurgir. He is a massive devil trapped by a contract with Raphael. If you choose to kill Yurgir—a difficult boss fight involving explosive mines and invisibility—he drops a piece of Infernal Metal upon his death. Alternatively, if you manage to talk him into committing suicide (a feat requiring high Persuasion or Insight), you can loot the metal from his remains without a direct confrontation.

Act 3: Finding Iron in Baldur’s Gate

By the time you reach the city of Baldur’s Gate, the scarcity of the material decreases significantly due to the presence of the Steel Watch—Lord Gortash’s giant mechanical constructs.

Steel Watcher Loot

Almost every Steel Watcher you defeat in the Lower City or at the Steel Watch Foundry has a chance to drop Infernal Iron or the even rarer Enriched Infernal Iron. While fighting them is dangerous due to their self-destruct sequence, it provides an infinite farm for the material if you are looking to craft the full suite of gear from Dammon. Once you disable the Steel Watch by completing the foundry questline, you can scavenge the remains of the deactivated watchers scattered throughout the streets.

Flymm Cargo and the Iron Throne

In the basement of Flymm Cargo (accessible through a hatch under crates), which serves as a secret entrance to the underwater prison known as the Iron Throne, you can find pieces of iron scattered on the floor in the machine storage rooms. Additionally, as you prepare to board the submersible for the Iron Throne, a piece is often found on a table in the docking area.

Purchasing from Huido

If you prefer a non-violent approach in the final act, a vendor named Huido at the Lower City docks occasionally sells Infernal Iron for approximately 1,000 gold pieces. This price can be reduced with high charisma or by passing specific dialogue checks related to your class or background.

Crafting with Dammon: The Flawed Helldusk Set

Once Karlach’s engine is fully stabilized (requiring two pieces of iron), Dammon can use additional pieces to create the Flawed Helldusk equipment. This set is excellent for the mid-game, particularly for heavy armor users like Paladins or Fighters.

  1. Flawed Helldusk Armour: This heavy plate offers a high Armor Class (18). Its unique feature is that it deals 1-4 Fire Damage to any attacker who hits the wearer within a 2-meter range. It also provides a reduction to all incoming damage.
  2. Flawed Helldusk Gloves: These are arguably the most versatile part of the set. They add 1-4 Fire Damage to your weapon attacks and 1-4 Necrotic Damage to unarmed strikes. Additionally, they grant a chance to inflict the "Bleeding" status on enemies.
  3. Flawed Helldusk Helmet: This piece provides a bonus to Saving Throws against spells and prevents attackers from landing Critical Hits on the wearer. It also grants a specialized version of the Magical Plate feature, reducing damage taken.

It is important to note that these "Flawed" versions are distinct from the legendary Helldusk Armor found in the House of Hope. However, they remain competitive options until the very end of the game.

Technical Considerations and Risk Management

A common issue players face is Dammon’s availability. If Dammon dies during the goblin attack on the grove or the shadow curse infiltration at Last Light Inn, Karlach’s quest cannot be completed, and the iron becomes useless except for its gold value. Always prioritize protecting Dammon during the "Isobel" encounter at the inn.

Another technical hurdle involves the game's inventory system. Occasionally, having the iron in your camp chest rather than your direct inventory will prevent the dialogue option with Dammon from appearing. If you find yourself at the smithy and the option to "give the metal" is missing, ensure all pieces are in your main character's personal bags.

Furthermore, the distinction between "Infernal Iron," "Infernal Metal," and "Infernal Alloy" is purely narrative. Mechanically, the game treats them as the same item ID for quest triggers. You do not need to hunt for a specific variant to satisfy Dammon’s requirements.

Strategic Advice for Collection

For the most efficient run, grab the Blighted Village iron and the Stonemason Kith alloy in Act 1. This gives you exactly the two pieces needed for Karlach before you even enter the Shadow-Cursed Lands. By Act 2, focusing on the Mason’s Guild piece is the path of least resistance, as it requires no complex boss fights or high-DC lockpicking.

As of the latest updates in 2026, the drop rates for Steel Watchers have been stabilized, so there is no longer a need to hoard every single piece found in Act 1 if you plan on visiting the city. Focus on the early pieces to ensure Karlach’s narrative progression, then use the Act 3 abundance to finish your party's gear optimization.