- Evolved skill
- Yes
Rules and interpretation
Maximum rank and unlock level are read from the Survivors build. Damage and cooldown depend on rank, gear and runtime formulas; this entry does not substitute Diablo II values.
Evolution: reach rank 1, hold 
Bone Armor, reach hero level 30, then open a chest.
Class
Evolves into
Evolves from
Evolution catalyst
Receives synergy from
| Name | Bonus per rank |
|---|---|
 Teeth | 7% |
 Bone Wall | 7% |
 Bone Prison | 7% |
 Bone Spirit | 7% |
Boosts
| Name | Bonus per rank |
|---|---|
Bone Spirit | 6% |
Teeth | 15% |