How do I design a fort to withstand a Bonemass boss fight?

Designing a fort to withstand the Bonemass boss fight in Valheim requires careful planning, as Bonemass is one of the toughest bosses in the game. This boss is found in the Swamp biome and specializes in dealing poison damage, summoning adds, and destroying structures. To prepare, you need to focus on creating a defensible base that minimizes damage from Bonemass and its minions while giving you a safe space to heal and fight back.\n\nFirst, choose a location near the Bonemass summoning altar but not too close. The Swamp biome is dangerous, so consider building your fort on the edge of the Swamp near a Meadow or Black Forest biome. This ensures you have a safer retreat point if things go wrong. Use the Hoe to level the ground and create a flat area for your fort. This prevents uneven terrain from interfering with your movement during the fight.\n\nYour fort should include high walls made of Stone or Core Wood. Bonemass can destroy weaker structures like Wood walls, so prioritize durability. Build a raised platform or tower inside the fort to give you a vantage point for ranged attacks. Use Stairs or Ladders to access this platform, but ensure Bonemass cannot reach it. The platform should be at least 4-5 meters high to avoid its melee attacks.\n\nIncorporate a trench or moat around your fort to keep Bonemass and its adds at a distance. Dig a deep trench using the Pickaxe and surround your fort with it. This prevents Bonemass from reaching your walls directly, giving you time to focus on ranged attacks or healing. Make sure the trench is wide enough so Bonemass cannot jump over it.\n\nStock your fort with essential supplies before the fight. Bring Healing Meads, Poison Resistance Meads, and Stamina Meads. Poison Resistance is critical because Bonemass deals heavy poison damage. Craft a Fermenter to brew these potions using ingredients like Honey, Thistle, and Ooze. Additionally, bring a fully upgraded Iron Mace, as Bonemass is weak to blunt damage. A Draugr Fang bow with Poison or Frost arrows is also useful for ranged attacks.\n\nDuring the fight, focus on kiting Bonemass around the trench while using your ranged attacks. If it gets too close, retreat to your raised platform and continue firing arrows. Clear adds like Skeletons and Blobs quickly to avoid being overwhelmed. Use your Healing Meads strategically and keep Poison Resistance active at all times.\n\nFinally, consider building a portal nearby for quick escapes or resupplies. Place it outside the Swamp biome to avoid interference from enemies. This ensures you can retreat safely if you run out of resources or need to repair your gear.\n\nBy following these steps, you can create a fort that withstands Bonemass''s attacks and gives you the upper hand in the fight. Prioritize durability, mobility, and preparation to ensure victory.