Following the March 10th Fields of Mistria update, the Fire Seal is finally accessible after completing the preceding altars. Unlocking it requires four offerings: a Faceted Rock Gem, Rockroot, Emerald, and a Sealing Scroll. Here's how to obtain each item:
Finding the Faceted Rock Gem

This rare artifact is located within the Fields of Mistria mines, specifically on floors 50-59 (we found one on floor 56). Use your pickaxe or shovel to unearth it from marked ground spots. Be prepared for some digging; it's a relatively uncommon find.
Locating Rockroot

Rockroot is a common forageable plant found on floors 50-59 of the mines. Look for a dark, root-like plant as shown in the image above. You only need one.
Obtaining an Emerald

Emeralds are the easiest to acquire. They're found in geodes on floors 50-59, are relatively common, and can also be obtained by breaking large boulders. They're also sold inexpensively (200 tesserae) at Balor's Wagon. If you've unlocked the Stone Refinery (added in the March 2025 update), you can craft them.
Acquiring the Sealing Scroll

The Sealing Scroll is obtained through a quest triggered by speaking with Juniper after discovering the seal. You'll need to commission Balor to acquire it, requiring these materials:
- 10 Silver Ingots
- 10 Rubies
- 10 Sapphires
- 10 Emeralds
These materials are commonly found in the mines. Once collected, deposit them at the bin near Balor's Wagon.
Unlocking the Fire Seal
Once you possess the Sealing Scroll, Faceted Rock Gem, Emerald, and Rockroot, return to floor 60 of the mines and make your offering. This will unlock the Fire Seal and access to a new biome (currently in Early Access).
Note: Fields of Mistria is in Early Access; content is subject to change. This information is accurate as of version 0.13.0 and will be updated if necessary.
Fields of Mistria is available now on Steam Early Access.