Bonemass: how to summon and beat it
Bonemass is the third boss of Valheim, in the Swamp. Offer 10 Withered Bone at the Boiling Death to summon it; it has 5,000 health and takes extra blunt and frost damage. Beating it opens the way to the Mountain.
How to summon Bonemass
Find the Boiling Death in the Swamp, then offer 10 Withered Bone at it. Everything about Withered Bone is on its page.
- Mine Muddy Scrap PileIn the Swamp. 1 at a time.
- Loot ChestIn the Swamp. 1 at a time.
Summon it with the console instead
spawn BonemassSpawns Bonemass in front of you. Needs devcommands, in single player or as the host.
Bonemass’s health and weaknesses
- 5,000Health at one star
- 2Weaknesses
- 4Resisted or immune
| Damage | Bonemass takes |
|---|---|
| Blunt | Weak (×1.5) |
| Slash | Resistant (×0.5) |
| Pierce | Very resistant (×0.25) |
| Fire | Very resistant (×0.25) |
| Frost | Weak (×1.5) |
| Poison | Immune |
Every other damage type hits it normally.
What to bring
The best of what you can have after The Elder, picked from the game data. Upgrade it as far as your stations go.
Food
Together: 230 health and 67 stamina. Try other combos in the food planner.
Armor
- Iron HelmetHead · armor 14–20
- Iron Scale MailChest · armor 14–20
- Iron GreavesLegs · armor 14–20
- Troll Hide CapeCape · armor 1–4
Weapons
What Bonemass drops
| Item | Amount | Note |
|---|---|---|
| Bonemass TrophyTrophy | 1 | Hang it at the Sacrificial Stones |
| WishboneUtility item | 1 | One for each player nearby |
Bonemass’s Forsaken power
Bonemass
The mass takes the brunt of your blows. The effort required to raise your shield lessens, and you can withstand harder hits.
- −100% block stamina
- -5 stamina per block
- Blunt: slightly resistant
- Slash: slightly resistant
- Pierce: slightly resistant
- Lasts 5 min, then 20 min before you can use it again
Hang the Bonemass Trophy on its stone at the Sacrificial Stones, where you started, then use your power key.
Valheim 1.0.17, from the game files. “What to bring” is the strongest of what you can have after The Elder, worked out from every recipe and source.
Quick answers
How do you summon Bonemass in Valheim?
Bring 10 Withered Bone to the Boiling Death in the Swamp and offer them at the altar. To get Withered Bone: mine muddy scrap pile (In the Swamp. 1 at a time); or loot chest (In the Swamp. 1 at a time).
How much health does Bonemass have?
5,000 at one star. Like every creature, bosses have more health in a world with more players nearby.
What is Bonemass weak to?
Blunt (weak (×1.5)) and Frost (weak (×1.5)). It resists slash, pierce and fire. Immune to poison.
What does Bonemass drop?
Bonemass Trophy and Wishbone (one per player).
What is Bonemass's Forsaken power?
The mass takes the brunt of your blows. The effort required to raise your shield lessens, and you can withstand harder hits. In numbers: −100% block stamina, -5 stamina per block, Blunt: slightly resistant, Slash: slightly resistant, Pierce: slightly resistant. It lasts 5 min with a 20 min cooldown. Hang the Bonemass Trophy at the Sacrificial Stones to use it.
What should I bring to fight Bonemass?
By then you can eat Serpent Stew, Cooked Serpent Meat and Sausages (230 health, 67 stamina), wear Iron Helmet, Iron Scale Mail, Iron Greaves and Troll Hide Cape and bring Iron Mace and Iron Sledge.
More free Valheim tools
Valheim 1.0.17, from the game files. Symbols drawn by us; Game Hosting is not affiliated with Iron Gate or Coffee Stain.