Valheim Iron Farming Guide: Crypts, Keys & Portals (2026)

Two things most Valheim iron farming guides still get wrong: that you need a Bronze Pickaxe to mine Muddy Scrap Piles, and that raw metal can never go through a portal. Neither is true anymore, and the second one changed with an update most guides haven't caught up to.

TL;DR: Iron in Valheim comes exclusively from Sunken Crypts in the Swamp biome, opened with a Swamp Key that only drops from The Elder. Any pickaxe mines Muddy Scrap Piles, not specifically Bronze. Crypts aren't melee-only, blunt weapons are just recommended against Draugr and Blobs. Since the Ashlands update, a Portal Stone allows teleporting ore and metal, breaking the old "no metal through portals" rule for players who've reached that far.

How do you farm iron in Valheim? (quick answer)

Iron Scrap comes from Sunken Crypts in the Swamp biome, both from chests and by mining Muddy Scrap Piles inside. You need a Swamp Key to open a crypt's gate, and The Elder, the game's second boss, is the only source of that key.

Key takeaways

• Iron Scrap is exclusive to the Swamp biome, found in Sunken Crypts, either in chests or by mining Muddy Scrap Piles.
• The Swamp Key only drops from The Elder, the second boss, killed in the Black Forest. It's reusable, not consumed when you open a gate.
• Any pickaxe mines Muddy Scrap Piles, not specifically Bronze. They only have 5 HP per segment.
• Crypts aren't melee-only. Any weapon works; blunt is just a strong recommendation against Draugr and Blobs, not a rule the game enforces.
• Ashlands does not add an alternative iron source. Charred Fortresses give Flametal, Molten Cores, Bloodstone, and Iolite, not Iron Scrap.
• A post-Ashlands Portal Stone allows teleporting ore and metal, which changes the old "no metal through portals" advice for players who've unlocked it.

Overview

As of the current patch (0.221.10, the "Five Years of Valheim" anniversary update from February 2026), nothing about Swamp-biome iron mechanics has changed. Iron Scrap still comes exclusively from Sunken Crypts, and the crypts themselves haven't been touched since. If you're returning to Valheim after time away, the iron-farming loop works exactly the way it always has, just with a few community misconceptions worth clearing up along the way.

Iron gear sits at a genuine difficulty wall for a lot of players. It's common to see posts describing entire multiplayer groups giving up around this point, having reached Bonemass with iron gear only to die repeatedly in the Swamp before finishing the job. Knowing exactly what the game requires, and what it doesn't, cuts a lot of that frustration out.

Ruined structures gating valuable loot are a running theme in Valheim, and Sunken Crypts follow the same pattern for iron.

The Swamp Key: the one requirement that actually gates iron

Before you can open a single Sunken Crypt, you need a Swamp Key. It drops from The Elder, the second boss fight, located in the Black Forest biome. There's no crafting recipe for it, no alternate drop source, and no way to open a crypt gate without one. The good news is that the key is reusable: once you have it, the same key opens every Sunken Crypt gate you find, indefinitely.

GODEEPER: If you haven't beaten The Elder yet, the boss order guide covers exactly where to find it and what to expect from the fight. Valheim Boss Order: All 7 Bosses Guide →

Step-by-step: an efficient iron farming route

1. Kill The Elder first if you haven't. Nothing below matters until you have a Swamp Key in your inventory.
2. Gear up for poison resistance and pack food before diving into the Swamp. It's one of the more dangerous early biomes, and Draugr archers near crypt entrances are a common bad first encounter.
3. Clear every Muddy Scrap Pile inside a crypt, not just the chests. Piles only have 5 HP per segment, so they're fast to break with any pickaxe, and skipping them leaves scrap on the table.
4. Expect a wide yield range per crypt, roughly 20 to 150 Iron Scrap depending on the crypt's size and how thoroughly you clear it. Don't assume every crypt gives the same amount.
5. Smelt at a 1:1 ratio. One Iron Scrap makes one Iron Bar. A Smelter holds up to 10 ore and 20 coal per load, so stock coal accordingly before a smelting session.
6. Plan your hauling route home, since standard portals won't carry raw ore back to base (see the portal section below for the one exception).

Two myths this guide is correcting

Myth: you need a Bronze Pickaxe to mine scrap piles

Any pickaxe works. Muddy Scrap Piles have only 5 HP per segment, so the starting Antler Pickaxe, repairable at any workbench, mines them exactly as well as a Bronze Pickaxe does. Bronze is still worth bringing on a Swamp trip since you'll likely want it for other ore veins while you're out there, but it isn't required specifically for scrap piles. A lot of older guides imply otherwise.

Myth: Sunken Crypts are melee-only

They aren't. Any weapon works inside a crypt, there's no game-enforced restriction. What's true is that blunt weapons are commonly recommended, because Draugr and Blobs, two of the more common Swamp-biome enemies you'll meet inside crypts, resist slash and pierce damage but take full damage from blunt weapons. That's a tactical recommendation players pass along, not a rule the game imposes. Crypts are also dimly lit in places, so a light source or the Dverger Circlet helps more than weapon choice does.

Does Ashlands change iron farming?

No. Charred Fortresses, the Ashlands biome's equivalent structure, drop Flametal, Molten Cores, Bloodstone, and Iolite, none of which substitute for Iron Scrap. Iron remains a Swamp-only resource even after Ashlands. If you were hoping a later biome would offer an alternate iron source, it doesn't, the Swamp trip stays mandatory.

What Ashlands does change is portal logistics, which matters a lot for anyone who's spent hours hauling scrap out of the Swamp by foot or boat.

Can you finally teleport iron? The Portal Stone changes the math

The long-standing Valheim rule is that ore and metal can't go through a standard portal, and that rule is still true for regular portals. But since the Ashlands update, the game added a Portal Stone, a specific structure that explicitly allows teleporting ores, metals, dragon eggs, Hildir's chests, and Mechanical Springs, items the standard portal rule normally blocks. There's also a world-modifier option to disable the ore-teleport restriction entirely at world creation, for groups who'd rather not deal with it at all.

If you've been hauling Iron Scrap the long way because you learned Valheim before this existed, it's worth knowing the Portal Stone is a real, non-mod mechanic now, not a workaround or exploit.

Standard portals still block raw ore and metal, but the Portal Stone added after Ashlands is a real exception to that rule.

GODEEPER: The Portal Stone is one of several Ashlands additions worth knowing before you push that far. Valheim Ashlands Guide: Fader & What's New →

Tips

Don't skip food and poison prep before a crypt run

The Swamp is one of the more dangerous early-to-mid biomes, and running in under-prepared is a bigger risk to your iron farming session than any pickaxe or weapon choice.

Bring a spare pickaxe if yours is close to breaking

Since crypt trips tend to run long once you're clearing every scrap pile in sight, having a backup means one broken tool doesn't end the run early.

Track your key, not your route

Because the Swamp Key is reusable and never consumed, the actual bottleneck is having killed The Elder, not finding more keys. Don't waste time looking for a second one.

Common mistakes

• Assuming you need a specific pickaxe tier for scrap piles. Any pickaxe handles their 5 HP per segment fine.
• Treating crypts as melee-only. No weapon type is blocked, blunt is just efficient against common Swamp enemies.
• Assuming iron becomes available from a later biome. Ashlands' Charred Fortresses give different materials entirely, not Iron Scrap.
• Hauling ore by hand out of habit. If you've unlocked the Portal Stone, you no longer need to.

Frequently Asked Questions

Where do you farm iron in Valheim? Sunken Crypts in the Swamp biome, from chests and Muddy Scrap Piles inside. Muddy Scrap Piles can rarely also appear underground in the Swamp outside crypts.

How do you get the Swamp Key in Valheim? It drops from The Elder, the second boss, found in the Black Forest. It's the only way to get one in vanilla play, and it's reusable, not consumed on use.

What pickaxe do you need to farm iron in Valheim? Any pickaxe works. Muddy Scrap Piles have only 5 HP per segment, so the starting Antler Pickaxe mines them just as well as a Bronze Pickaxe.

Are Sunken Crypts melee-only in Valheim? No, that's a myth. Any weapon works inside crypts. Blunt weapons are commonly recommended because Draugr and Blobs resist slash and pierce damage, not because the game enforces it.

Can you teleport iron through portals in Valheim? Not through a standard portal. Since the Ashlands update, a Portal Stone was added that explicitly allows teleporting ores, metals, and a few other restricted items.

Does Ashlands add another way to get iron in Valheim? No. Charred Fortresses in Ashlands yield Flametal, Molten Cores, Bloodstone, and Iolite, not Iron Scrap. Iron remains exclusive to the Swamp biome.

Related Reading

• Valheim Deep North Biome Guide: Enemies and Gear 2026: Valheim deep north biome confirmed enemies, gear tiers, and dungeons. How to enter safely with
• Valheim 1.0 Release Date: September 9 with Deep North Biome: Valheim 1.0 release date is September 9, 2026. Deep North adds Gammeltrolls, grappling hook, and
• Valheim Food & Buff Guide: Best Foods 2026: what to eat before a Swamp trip, since poison resistance and survivability matter more here than gear alone.

References

• Valheim on Steam
• Five Years of Valheim - official patch notes
• How to find the Swamp & Farm Iron - Valheim guide (YouTube)