Mines Biome Guide
Fields of Mistria Ancient Ruins Guide — Floors 81–99
The Ancient Ruins are the fifth and final mine biome, running from Floor 81 to Floor 99, with special stops at Floor 90 and Floor 100. This darkness-shrouded area is the source of Mistril and Pink Diamond.
📍 Biome Overview
| Floors | 81–99 |
|---|---|
| To Unlock | Break the Ruins Seal |
| To Progress | Reach Floor 100, find the Magic Key, and break the Final Seal |
| Theme | The Final Seal |
⛏️ Key Resources
- Mistril Ore
- Pink Diamond
- Voidite
👾 Monsters & Drops
- Pink Sapling
- Purple Rockclod
- Mistrilclod
- Void Cat
- Mimic
🐟 Notable Fish
- Luminescent Crab
- Winged Shrimp
- Gazer
- Giant Jellyfish
- Coelacanth
💡 Pro Tips
- Every floor starts in darkness; use Sacred Light or wear Mistril equipment to expand your light radius.
- Sacred Light lasts for about 5 real-world minutes and carries across floor transitions.
- Floor 90 contains the Priestess Tablet, Field Room, and Dragon Forge; Floor 100 holds the Final Seal.
🔗 Related Guides
🔎 Sources & Version
Game version: 1.0 · Last updated: 2026-08-13