- Evolved skill
- No
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 8, hold 
Bone Wall, reach hero level 18, then open a chest.
Class
Evolves into
Evolution catalyst
Receives synergy from
| Name | Bonus per rank |
|---|---|
Bone Wall | 15% |
 Bone Spear | 15% |
 Bone Prison | 15% |
 Bone Spirit | 15% |
Boosts
| Name | Bonus per rank |
|---|---|
Bone Spear | 7% |
Bone Spirit | 6% |