What is the best way to farm coal for smelting in Valheim?

Coal is a crucial resource in Valheim for smelting ores and crafting advanced items. The most efficient way to farm coal is by using a Charcoal Kiln, which converts wood into coal. To unlock the Charcoal Kiln, you must first defeat the first boss, Eikthyr, and obtain Hard Antlers. These are used to craft an Antler Pickaxe, which allows you to mine Tin and Copper in the Black Forest biome. Once you have these materials, you can craft a Forge and unlock the Charcoal Kiln recipe.\n\nTo build a Charcoal Kiln, you need 20 Stone and 5 Surtling Cores. Surtling Cores are found in Burial Chambers in the Black Forest or dropped by Surtlings in the Ashlands biome. Place the Charcoal Kiln near your base for easy access. To produce coal, simply load the kiln with wood. Each piece of wood yields one coal, and the process takes about 15 seconds per unit. This method is highly efficient and sustainable, as wood is abundant in most biomes.\n\nAnother way to farm coal is by defeating Greydwarf enemies in the Black Forest. Greydwarfs drop Resin and occasionally coal when killed. While this method is less reliable than using a Charcoal Kiln, it can supplement your coal supply while exploring. Additionally, Greydwarf Brutes and Shamans have a higher chance of dropping coal, so prioritize defeating them if you encounter them.\n\nFor experienced players, Surtling Cores can also be farmed in the Ashlands biome. Surtlings, fire-based enemies, drop both Surtling Cores and coal when killed. However, the Ashlands biome is dangerous and requires advanced gear to survive. If you''re up for the challenge, this method can yield large amounts of coal quickly. Be sure to bring fire resistance mead and strong weapons to handle the Surtlings effectively.\n\nA practical tip for maximizing coal production is to automate your wood collection. Build a portal near a dense forest area and use a Bronze Axe or better to chop down trees efficiently. Transport the wood back to your base using a cart or portal, and feed it directly into your Charcoal Kiln. This setup ensures a steady supply of coal for all your smelting needs.\n\nFinally, always keep an eye out for abandoned structures in the Meadows or Black Forest biomes. These often contain chests with coal and other valuable resources. While not a primary source, these finds can help supplement your coal reserves without additional effort. By combining these methods, you can maintain a steady supply of coal for smelting and crafting throughout your Valheim journey.