Bonemass' Altar
| Bonemass' Altar | |
|---|---|
| |
| The boiling death altar in the Swamp where ten Withered Bones summon Bonemass. | |
| Biome | Swamp |
| Type | Boss altar |
| Per World | Up to 5 |
| Enemies | Skeleton, Blob |
| Boss | Bonemass |
| Loot | Wishbone, Bonemass Trophy |
| Entry | 10 Withered Bones |
Bonemass' Altar is the Forsaken Altar of Bonemass, a boiling death altar in the Swamp. Place ten Withered Bones at the altar to summon him.
Where to Find It
Up to five altars generate in a world. They only appear where the surrounding area is fully Swamp, between 2,000 and 10,000 m from the world centre and at least 3,000 m apart, at an altitude of 0 to 2 m on ground with a terrain difference of 4 m or less. World generation gives them priority. A Vegvisir marks the nearest altar on the map, and you find Vegvisirs in Sunken Crypts and, at a 30% chance, at Swamp Runestone Towers.
What's Inside
The altar's runestone reads COOK THEIR REMAINS. Once summoned, Bonemass stays until you defeat him, and you can summon him again as often as you make the offering.
Creatures
| Creature | Image | Notes |
|---|---|---|
| Bonemass | 
|
Summoned with 10 Withered Bones; 5,000 health. |
| Skeleton | 
|
Every 50 seconds Bonemass throws a glob that spawns four Skeletons or Blobs, up to eight of each. |
| Blob | 
|
Spawned by the globs Bonemass throws, up to eight at once. |
Loot
| Container | Item | Image | Amount | Chance |
|---|---|---|---|---|
| Bonemass | Bonemass Trophy | - | 1 | 100% |
| Bonemass | Wishbone | 
|
1 per player online | 100% |
Notes
- Bonemass has an aura that forces rain.
- The Wishbone he drops finds buried Silver veins in the Mountain and buried Muddy Scrap Piles in the Swamp.
- You can summon a boss without first finding its altar through a Vegvisir.
All Swamp Locations
| Location | Image | Type | Description |
|---|---|---|---|
| Abandoned Hut | 
|
Point of interest | A ruined stilt house in the Swamp that can hold a chest guarded by a Wraith or Draugr. |
| Bonemass' Altar | 
|
Boss altar | The boiling death altar in the Swamp where ten Withered Bones summon Bonemass. |
| Geyser | 
|
Natural feature | A fire geyser in the Swamp protected by three Surtlings. |
| Sunken Crypt | 
|
Dungeon | A Swamp dungeon opened with the Swamp Key and mined for Scrap Iron. |
| Swamp Grave | 
|
Point of interest | A circle of six large stones in the Swamp around a Swamp Chest. |
| Swamp Runestone Tower | 
|
Point of interest | A ruined stone tower in the Swamp that can hold a Vegvisir to Bonemass' altar. |
| The Bog Witch's Hut | 
|
Trader camp | The Bog Witch's hut in the Swamp, where she trades under a protective dome. |
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