How many "Bonemass" does one Valheim world place?

A fresh world makes 5 placement attempts for Bonemass.

Where does Bonemass spawn?

Bonemass generates in Swamp, under the “Median” rule — the zone and all eight of its neighbours must share the biome, and only inside a forest area. Altitude: any altitude. It is limited to 2,000–∞ m from the centre of the world centre.

How far is the nearest Bonemass from spawn?

Measured over 600 sampled worlds, the closest copy was 2,079 m from the spawn area, the typical distance was 2,821 m, and in 9 worlds out of 10 it sat within 3,901 m. All distances are straight-line.

How much space does Bonemass need to generate?

The generator keeps a 19.79 m exclusion radius clear around each placement and requires at least 3,000 m to the nearest similar placement, with terrain varying by no more than 4 m across the footprint. The exclusion radius is clearance the terrain must offer, not the size of the structure you walk into.

Locations

Bonemass — Valheim Location

Bonemass world-generation rules in Valheim 1.0: how many copies a world places, the biome and altitude it needs, its spacing and footprint, and how far the nearest copy sits from spawn.

Boss Swamp Verified 1.0

Find Bonemass on the map from seed The map centres the first copy it finds in the world on screen.

If the name comes up struck through, this world has no room for it — type your own seed and the map looks again.

Nearest copy over 600 sampled worlds generated by our world map: closest seen 2,079 m, typical 2,821 m, and in 9 worlds out of 10 within 3,901 m — straight-line from the spawn area.

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0 · Bonemass

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How it generates

Prefab	Per world	Biome area	Altitude	Min spacing	Footprint
Bonemass	5	Median in forest only	any altitude	≥ 3,000 m	19.79 m radius

Biome area — “Median” means the zone and all eight of its neighbours must share the biome, so it never generates on a biome border; “Everything” may place anywhere inside the biome.
Footprint is the exclusion radius the generator keeps clear around the piece, not the size of the structure you walk into.
Per world counts placement attempts, so a number here is an upper bound — terrain checks decide how many actually land (see the sampled-worlds figures above). unique is a separate flag: the table checks it once before placement begins, to skip re-rolling these on a world that already exists, and it does not cap the attempts a fresh world makes.
Centre band: 2,000–∞ m from the centre .
Terrain tolerance — the generator allows up to 4 m of height change across the footprint (no minimum) .

Where to find it

Other boss placements

Find one in your world

The interactive map generates your world from its seed and marks every one of these, or use the seed finder to search for a world that places them the way you want.

Common questions

How many "Bonemass" does one Valheim world place?: A fresh world makes 5 placement attempts for Bonemass.
Where does Bonemass spawn?: Bonemass generates in Swamp, under the “Median” rule — the zone and all eight of its neighbours must share the biome, and only inside a forest area. Altitude: any altitude. It is limited to 2,000–∞ m from the centre of the world centre.
How far is the nearest Bonemass from spawn?: Measured over 600 sampled worlds, the closest copy was 2,079 m from the spawn area, the typical distance was 2,821 m, and in 9 worlds out of 10 it sat within 3,901 m. All distances are straight-line.
How much space does Bonemass need to generate?: The generator keeps a 19.79 m exclusion radius clear around each placement and requires at least 3,000 m to the nearest similar placement, with terrain varying by no more than 4 m across the footprint. The exclusion radius is clearance the terrain must offer, not the size of the structure you walk into.