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To get an Intricate Key in Valheim, find a Mould: Intricate Key in the Deep North’s Winding Tunnels, use one mould and five Bloodgold at a level 4 Black Forge to make a Cast: Intricate Key, then process the cast with Liquid Frost in a Frost Foundry. The finished key—not the mould or cast—opens Mörkhalla.
Find the mould in the Deep North
Search the Winding Tunnels, which guides place beneath large Abandoned Village buildings, particularly the longhouse. Inside, check rubble and scrap piles for a Mould: Intricate Key. Some tunnel enemies are also reported to drop moulds, but published guides do not establish reliable drop rates, so treat enemy drops as an alternative rather than a dependable farming method. PC Gamer’s September 9, 2026 guide and a Deep North guide verified for Valheim 1.0 and updated October 4, 2026 describe the tunnel route.
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Turn the mould into a cast
- Collect five Bloodgold for each key you intend to make.
- At a level 4 Black Forge, combine the Bloodgold with one Mould: Intricate Key to craft a Cast: Intricate Key. The mould is consumed, so you need another mould for each additional cast.
The Black Forge step makes a cast, not the usable key. The item recipe and station requirements are reported in the item guide.
Finish the cast in a Frost Foundry
Put the cast in a Frost Foundry and use Liquid Frost to produce the finished Intricate Key. The Deep North guide lists the Frost Foundry’s build cost as 10 Frostcores, 15 Iron, and 20 Stone. It identifies the Frigid Kiln as the station that turns Ice into Liquid Frost, and the Blast Furnace as the source of Bloodgold; these are useful preparation details, though they come from guide reporting rather than directly verified official documentation. See the Deep North guide.
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Use the finished key at Mörkhalla
Take the finished key to Mörkhalla and use it on its gates. A current item guide advises bringing three finished keys for its described Mörkhalla progression route; treat that as route guidance, not as an independently confirmed universal requirement. PC Gamer’s item guide describes the three-key route.
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Keep the three item stages straight
- Mould: found in the Deep North Winding Tunnels; consumed when crafting.
- Cast: made from one mould and five Bloodgold at a level 4 Black Forge; not usable on the gate.
- Finished Intricate Key: made by processing the cast with Liquid Frost in a Frost Foundry; used to open Mörkhalla.
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