Bonemass' altar
Bonemass' altar is a boss altar in Valheim 1.0.17. The game tries to place up to 5 of it in the Swamp, 2,000–10,000 m from the centre of the world, at an altitude of 0–2 m. To summon the boss: 10 Withered Bones on the altar.
Find the bonemass' altar of your seed on the map
See Bonemass for health, weaknesses and drops.
Placement rule
| Game name | Biome | Distance from centre | Altitude | Up to | Chests | Spawners |
|---|---|---|---|---|---|---|
Bonemass | Swamp | 2,000–10,000 m | 0–2 m | 5 |
The game places these before the rest of the world is filled in, so the same seed always gives the same positions. Type a seed into the seed map to see where they are.