Coal

Coal is a resource added in version v1.0.0050. It is found in cave biomes and serves as a valuable industrial fuel and crafting material in the midgame economy.

When used as fuel in the Furnace, Coal provides better smelting efficiency than Charcoal, making it the preferred choice for players looking to improve metal production throughput. It is also required when enhancing equipment at the Royal Forge, so even after other fuels become available, it remains important for progression and gear upgrades.

• Best saved for Furnace work and Royal Forge upgrades rather than spent casually.
• Since it outperforms Charcoal as fuel, it is especially useful when large amounts of smelting are needed.
• Exploration of cave biomes is the main way to secure a reliable supply.