How do I estimate the number of surtling cores needed for a smelter and kiln?

In Valheim, surtling cores are essential for crafting key structures like smelters and kilns, which are vital for progressing through the game. A smelter is used to turn raw ores like copper and tin into usable metal bars, while a kiln converts wood into coal, a necessary fuel for smelting. Both structures require surtling cores as part of their crafting recipes, making them a critical resource for mid-game progression.\n\nTo craft a smelter, you need 20 stones, 5 surtling cores, and 6 copper bars. For a kiln, you need 20 stones, 5 surtling cores, and 4 fine wood. This means you will need a total of 10 surtling cores to build both structures. However, if you plan to expand your base or create multiple smelters and kilns for efficiency, you will need to gather additional cores. For example, a setup with two smelters and two kilns would require 20 surtling cores.\n\nSurtling cores are primarily found in the Black Forest biome, inside Burial Chambers. These dungeons are scattered throughout the biome and are identifiable by their stone entrances. Inside, you will encounter skeletons and other enemies, so it is recommended to bring a shield, a weapon, and some food for health regeneration. Surtling cores are often found in small clusters of 2-4, so exploring multiple Burial Chambers will yield a good supply.\n\nAnother way to obtain surtling cores is by defeating surtlings, fiery creatures found in the Ashlands biome or near fire geysers in the Swamp biome. Surtlings drop surtling cores upon death, and farming them can be an efficient way to gather cores if you have the necessary gear to survive these dangerous areas. However, this method is more suited to experienced players who have already progressed further in the game.\n\nFor new players, focusing on Burial Chambers in the Black Forest is the safest and most reliable way to gather surtling cores. Make sure to bring a torch or other light source, as the chambers are dark and can be disorienting. Additionally, mark the locations of Burial Chambers on your map to avoid revisiting the same ones. This will save time and ensure you maximize your core collection.\n\nOnce you have gathered enough surtling cores, return to your base and craft your smelter and kiln. Place them in a secure area, preferably near your forge and other crafting stations, to streamline your metalworking process. Remember that both structures require fuel to operate, so gather plenty of wood for the kiln and ore for the smelter.\n\nA common challenge players face is underestimating the number of surtling cores they need. If you plan to expand your base or create multiple smelters and kilns, it is wise to gather extra cores during your initial exploration. This will save you from having to revisit dangerous areas later. Additionally, consider building a portal near your base to quickly travel to and from the Black Forest or Swamp biome for additional core farming.\n\nIn summary, surtling cores are a crucial resource for crafting smelters and kilns in Valheim. To estimate the number of cores needed, calculate based on your planned structures and gather extras for future expansion. Focus on exploring Burial Chambers in the Black Forest for a steady supply, and consider farming surtlings in the Swamp or Ashlands if you are more experienced. With proper planning and preparation, you can efficiently gather the cores needed to advance your crafting capabilities and thrive in the world of Valheim.