Mycelium is the pale, bumpy crust that spreads across the ground in and around the Shroud, carpeted in small mushroom caps and dry, coral-like growth. You gather it by mining those patches with a pickaxe, and you will want a steady supply once the Flame Altar is ready for its next upgrade.
Quick answer: Head into a Shroud zone, find the white mushroom-covered ground on the slopes leading down into the fog, and mine it with a pickaxe. Each pickup adds Mycelium to your inventory.
What Mycelium is
Mycelium is a crafting material tied to the Shroud. Its in-game description reads: “Mycelium of mushrooms that have been absorbing the magical properties of the Shroud. Could this be used for alchemical purposes?”
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What Mycelium is used for
Taking the Flame Altar from level 2 to level 3 costs 25 Mycelium, along with 10 Wax, 10 Salt, 5 Spark, 10 Shroud Wood, 10 Flintstone, and 1 Scavenger Matron Helmet. Beyond that, it feeds several boots and a couple of crafted substances.
| Recipe | Crafter | Mycelium |
|---|---|---|
| Flame Altar level 2 to 3 | Flame Altar | 25 |
| Alchemist Apprentice Boots | Alchemist | 15 |
| Rising Fighter Boots | Blacksmith | 15 |
| Scout Boots | Hunter | 15 |
| White Glowing Substance (makes 20) | Alchemist | 10 |
| Mycelium Overgrown Block (makes 100) | Workbench | 2 |
The boots each pair Mycelium with their own extras. Alchemist Apprentice Boots also take 3 Torn Cloth, 6 String, and 2 Resin. Rising Fighter Boots need 2 Animal Fur, 5 Resin, and 1 Metal Sheets. Scout Boots call for 8 String, 4 Dried Fur, and 2 Resin. The White Glowing Substance recipe adds 7 Springlands Dirt, 20 Bonemeal, and 1 Wood Acid, while the Mycelium Overgrown Block just mixes in 2 Stone.
Items not to confuse with Mycelium
Two other things share the name or the look, and neither is the crafting material you mine from the Shroud.
- Acidic Mycelium is a separate material found in its own spots, not interchangeable with plain Mycelium.
- The Farmer makes a separate building material also named Mycelium (2 Fossilized Bone + 3 Mycelium = 100), which you apply to your base with the Overgrowth Tool. It is for decoration, not crafting.






