Chasing the Infernal Iron in the Shattered Sanctum? Yeah, I've been right where you are.
This place is a genuine maze, especially when all you want is to patch up Karlach. Here's the part that'll save you an hour: this particular Infernal Iron isn't locked behind a boss or some hidden puzzle. It's just sitting in a merchant's inventory.
I literally strolled past her on my first run and then wasted half an hour cracking open every barrel in the temple. Don't be me. Go straight to Roah Moonglow.
Where to Find the Infernal Iron in the Shattered Sanctum
Roah Moonglow is a halfling merchant set up inside the goblin temple. You don't need to assassinate the goblin leaders or hunt down some special key. Gold — or a character with sticky fingers — is all you're really after.
Roah Moonglow's Location
Route I use every time:
- Enter the Goblin Camp from the Blighted Village side or the Risen Road approach.
- Head for the big ruined temple in the middle of camp. That's the Shattered Sanctum's main entrance.
- Push through the temple doors until "Shattered Sanctum" shows up on your screen.
- Scan the main hall for the merchant who isn't a goblin. Roah stands out, usually parked near a little trading spot with goblins milling around.
- Talk to her and open the trade or barter dialogue.
- Scroll her inventory until you see Infernal Iron. It's not some secret stash item — it's right out in the open.
- Buy it. Short on gold? Come back later, or get creative.
New player warning: lost? Peek at your minimap for an NPC marker around the Sanctum's center. She's by the pillars and ruined shrine tables where the goblins do their dealing.
Can You Steal It Instead of Buying It?
You can. Roah isn't one of those protected story NPCs, so her pockets are as fair game as any other merchant's.
Crouch near her, break line of sight, and send in a character with decent Sleight of Hand. Pickpocket, grab the Iron, walk away.
Save first. Get caught and the whole Sanctum goes hostile — suddenly you're fighting every goblin in the room.
Fog Cloud or Darkness can cover you, but only if you don't spook the crowd. Better plan: do all your shopping and lifting before you start killing goblin leaders. The second the camp goes on alert, Roah might turn hostile or bolt, and your easy Infernal Iron source is gone.
What to Do With the Infernal Iron
Don't sell it. Don't bury it in a camp chest and forget it exists. This thing has exactly one job.
Give It to Dammon for Karlach
Infernal Iron is a core quest item for Karlach's personal story. Bring it to Dammon, the tiefling blacksmith camped out in the Emerald Grove during Act 1.
Talk to him and pull up the dialogue about Karlach and her infernal engine. Hand over the Iron and he'll use it to repair or upgrade her.
That doesn't wrap Karlach's quest in Act 1 — far from it. But it's a big step, and you get some genuinely nice story moments after the handoff.
Karlach isn't in your party yet? Just hold the Iron. It's a quest item, not spare crafting material.
What About Karlach's Later Repairs?
Her story rolls into Act 2. If Dammon lives and meets you again at Last Light Inn, you'll likely need another Infernal Iron for the next repair.
Which is why grabbing extra Infernal Iron whenever you spot it is smart. The Roah Moonglow piece in the Shattered Sanctum is your dependable one. And if you want another free piece early on, check the abandoned blacksmith basement in the Blighted Village.
Common Mistakes Players Make
People mess this up constantly. The biggest traps I see:
Mistake 1: Killing Goblins Before Shopping
If you jump Priestess Gut, Minthara, or Dror Ragzlin before buying from Roah, the whole goblin camp turns on you. Roah might join the fight or just disappear.
New player warning: shop first. Wipe out every goblin later if you feel like it, but buy the Iron before that war starts.
Mistake 2: Confusing Infernal Iron With Regular Iron
Baldur's Gate 3 is stuffed with useless lumps of metal. Regular Iron is absolutely not Infernal Iron.
Glance at the item name before you buy or lift it. Hand Dammon common iron and nothing happens. You just burned gold for nothing.
Mistake 3: Trying To Use the Iron From Your Inventory
You can't just "use" Infernal Iron on Karlach from your inventory. She doesn't work like a potion. Dammon is the one who has to install it.
Don't toss it at Karlach and wait for a repair scene. Find Dammon and talk to him. That's the actual quest loop.
Mistake 4: Waiting Too Long in Act 1
Once the Emerald Grove or goblin camp situation resolves, the tieflings can pack up and leave. Dammon won't stick around if the camp clears out.
Got the Iron and Karlach is waiting? Don't drag it out. Get the repair done before Act 1 closes, or you're sitting on it until Dammon shows up again in Act 2.
FAQ: Infernal Iron in the Shattered Sanctum
Is there more than one Infernal Iron in the Shattered Sanctum?
The dependable one is the piece Roah Moonglow sells. Other Infernal Iron pieces are scattered around Act 1, but inside the Shattered Sanctum, Roah is your main guaranteed source.
Want extra Iron for Karlach's quest and later repairs? Also check the Blighted Village. That spot hands you another free piece with no merchant involved.
Can I still buy it after I kill all the goblin leaders?
Probably not. Once the goblin camp goes hostile, Roah can turn hostile or flee. Shopping after a big fight has already started is a bad bet.
Plan on wiping out the leaders? Buy the Iron first. It's the only safe way to make sure you don't lose it.
Does buying it from Roah count for Karlach's quest?
Yep. Buy it, steal it, pickpocket it — same quest item either way. Once it's in your inventory, haul it to Dammon and Karlach's story moves forward.
What happens if I give the Iron to Dammon while Karlach is already in my party?
That's exactly how it's supposed to go. Dammon patches her engine, and you unlock new dialogue and story beats for her.
Her quest isn't fully done in Act 1, but you'll have made the real progress. That's all that counts.
Bottom line? After the Infernal Iron in the Shattered Sanctum? Find Roah Moonglow. Buy it or sneak it, but don't leave the Sanctum without it.
Karlach will be glad you did.
