Intricate Key: Mould, Cast and Finished Key

Intricate Key is a key tied to Deep North progression. You obtain it from a Winding Tunnels mould, Bloodgold, and the Frost Foundry, and its main role is opening Mörkhalla. Use this page alongside the Deep North guide and the item catalog.

Quick facts

How to obtain

1. Find an Intricate Key mould in Winding Tunnels, including from Elaking.
2. At a level 4 Black Forge, combine the mould with five Bloodgold to make the cast.
3. Fuel the Frost Foundry with Liquid Frost and process the cast into the finished key.
4. Use the key to unlock Mörkhalla.

What it's used for

• Open Mörkhalla and continue the route to Malicious Blood.
• Keep mould, cast, and finished key distinct when checking your inventory.
• Build the kiln and foundry before committing Bloodgold to the cast.

Common mistakes

• Trying to use the mould directly on Mörkhalla.
• Stopping at the cast instead of processing it in the Frost Foundry.

From mould to three finished keys

Treat the mould, cast, and finished key as three separate items. Find an Intricate Key mould in the Winding Tunnels, then take it to a level 4 Black Forge with five Bloodgold. Crafting consumes the mould and produces a cast. Do not destroy or spend a mould until the five bars are ready: a mould cannot be reused, and losing one means another dungeon search.

The cast still does not open a door. Build the Frost Foundry from 10 Frostcores, 15 Iron, and 20 Stone, fuel it with Liquid Frost, and process the cast into the finished key. Liquid Frost comes from five Ice in the Frigid Kiln. This workshop step is why carrying a mould straight to Mörkhalla fails.

You need three finished keys to complete the route, because each locked Mörkhalla entrance consumes one. Each dungeon clear leads to one Jotun Invasion and one Malicious Blood; three blood open the Strange Bowl at the Aesir Passage. Gather three moulds and reserve 15 Bloodgold as early as possible.

The hidden prerequisite chain is: Fader Relic → Eternal Pyre → Embers → Ember Charge → Petrified Tissue → Bloodgold → Intricate Key cast.

Frequently asked questions

How many Intricate Keys are needed?

Three finished keys are needed because each Mörkhalla entrance consumes one.

Is the key mould reusable?

No. A level 4 Black Forge consumes one mould and five Bloodgold to make each cast.

Three-key checklist

• Crafting away the only mould before five Bloodgold is on hand or the foundry chain is ready.
• Bringing a cast to the Mörkhalla lock; only the foundry-finished key works.
• Building one key and assuming it can open all three dungeons.

Inventory checklist

For the complete route, assemble three moulds, 15 Bloodgold, and enough Liquid Frost to process every cast. Keep them in three matched sets at the workshop. This makes it obvious whether another tunnel, Gammeltroll, or ice run is still required.

The keys are consumed at separate Mörkhalla entrances. Place a portal before using each one and bank the dungeon loot before following the invasion marker. A death after opening the door does not replace the key, so the recovery route should be ready first.

In multiplayer, give each key to the player opening that specific entrance and keep the remaining keys at base. This prevents a single corpse run from putting the whole three-dungeon sequence at risk.

Documentation status

Iron Gate's 1.0 notes confirm the named content; exact quantities and route details here are included where current hands-on guides and game-data references agree.

Sources

Sources: Official Valheim 1.0 notes, Valheim.tools game-data guide, Beebom guide, Valheim.tools 1.0 database update, Valheim.tools intricate key item data.