What is the best way to use portals during the Bonemass fight?

Using portals effectively during the Bonemass fight in Valheim can significantly improve your chances of success. Bonemass is one of the game''s toughest bosses, found in the Swamp biome, and requires careful preparation. Portals allow you to quickly return to your base for repairs, restocking, or healing, making them a critical tool for this fight. However, their use requires strategic planning to avoid wasting time or resources.\n\nBefore engaging Bonemass, you must craft a portal at your base and another near the boss altar. To craft a portal, you need 20 Fine Wood, 10 Greydwarf Eyes, and 2 Surtling Cores. Fine Wood is obtained from Birch or Oak trees, Greydwarf Eyes drop from Greydwarfs, and Surtling Cores are found in Burial Chambers or dropped by Surtlings in the Ashlands. Place one portal at your base and name it, then carry the materials for a second portal to the Swamp biome.\n\nWhen setting up the portal near Bonemass, choose a safe location away from the boss''s spawn point. The Swamp biome is dangerous, with enemies like Draugr, Leeches, and Blobs, so clear the area before placing the portal. Build a small shelter around the portal to protect it from enemy attacks and weather damage. This shelter can also serve as a temporary respawn point if you die during the fight.\n\nDuring the fight, use the portal to retreat when your health is low or your gear is damaged. Bonemass deals heavy poison and blunt damage, so you''ll need to repair your armor and weapons frequently. Stock your base with healing meads, poison resistance meads, and repair materials like Leather Scraps and Iron. Poison resistance meads are especially important, as they reduce the damage from Bonemass''s poison attacks.\n\nOne common challenge is running out of stamina during the fight. Bonemass is slow but has powerful area-of-effect attacks, so you need to dodge and attack efficiently. If you find yourself low on stamina, use the portal to return to your base, rest by a fire to regain the Rested buff, and then return to the fight. The Rested buff increases stamina regeneration, which is crucial for surviving the battle.\n\nAnother practical tip is to use the portal to resupply arrows if you''re using a bow. Bonemass is weak to Frost damage, so Frost Arrows are highly effective. However, you may run out of arrows during the fight, so keep a stockpile at your base and use the portal to replenish your supply quickly. This strategy ensures you can maintain consistent damage output without leaving the fight for too long.\n\nFinally, remember that portals cannot transport metal ores or ingots. If you need to repair or craft gear that requires metal, you''ll need to transport it manually or use a Longship to carry large quantities. Plan ahead and ensure your gear is fully repaired before starting the fight to minimize the need for metal repairs during the battle.\n\nIn summary, portals are a game-changing tool for the Bonemass fight. They allow you to retreat, restock, and recover without losing progress. By setting up a secure portal near the boss altar and using it strategically, you can overcome Bonemass''s challenges and emerge victorious. Always prioritize safety, preparation, and resource management to make the most of your portal usage.