Bonemass
Bonemass — an achievement from the “Bosses” group. Unlocked by defeating the boss Bonemass, the third Forsaken, from the Swamp biome.
Defeat the Writhing Dead.
How to get it
- After the victory you get a
Wishbone, needed for The Treasure Hunter. - The victory counts if you have hit the boss at least once; you do not have to deal the final blow.
Bonemass Swamp Summon 
10× Withered Bone Altar Bonemass’s Altar The altar is in the Swamp. It is shown by vegvisirs in sunken crypts and swamp ruins.
Open the boss pageRelated achievements
All achievements
Bosses 
Exploration 
Building 
Collections 
Routine 
Death 
