Find Frostcores as floating blue orbs inside Deep North Winding Tunnels, then use 10 with 15 Iron and 20 Stone to build a Frost Foundry near a Workbench.
Frostcores connect the Deep North’s underground exploration to its cold crafting setup. Expect a dark dungeon run with gathering and combat before you can return to base and place the new workstation.
How to collect Frostcores from Winding Tunnels in Valheim
Search the Deep North’s ruined structures, descend into the tunnels, and follow the blue glow to the Frostcores.
STEP 1/6
Find the underground entrance
Search the Deep North for pre-built wooden structures, then look inside the ruins for a circular opening leading underground.

STEP 2/6
Enter the Winding Tunnels
Descend into Winding Tunnels with a light source so you can see through the dark passages.
STEP 3/6
Harvest Luminous Larva
Collect the glowing Luminous Larva directly from the tunnel walls while exploring.

STEP 4/6
Clear the tunnel creatures
Fight through the hostile creatures blocking the passages as you continue the search.
STEP 5/6
Look for floating blue light
Check the dungeon passages for the distinctive floating blue orbs that mark Frostcores.

STEP 6/6
Pick up the Frostcore
Approach a blue orb and press E when the Frostcore pickup prompt appears.
Equip combat gear before descending because the tunnels contain ordinary Elsking and larger eyeless variants.
Video help
Resources to collect inside Winding Tunnels
Luminous Larva can be kept as a crafting ingredient or used as a light source, making them useful side loot rather than scenery.
Watch for collectible moulds as well. Mould: Intricate Key creates a powerful key when filled with the right material.
Using the Frost Foundry
Back at base, open the build menu beside a Workbench and place the Frost Foundry with 15 Iron, 20 Stone, and 10 Frostcore.
The foundry uses extreme cold to harden filled moulds into finished items. Face the placed structure and press E to add Liquid Frost.
Its reservoir holds 20 units and displays 0/20 when empty.
Building the Frigid Kiln with Frostcores
The related Frigid Kiln costs 20 Stone and 5 Frostcore, with a nearby Workbench required for placement.
This kiln uses a strange, chilling process to produce a potent fuel.






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