- Skill tree
- Earth-Shakers
- Upgrade cost
- 3 Oni Stones
- Mission requirement
- Final hidden Oni power
- Unlock location
- Not yet verified for this hidden-power milestone.
- Activation
- Hold Oni Armament (With Sufficient Oni Power Gauge)
Reference tables
1 table
Unlock path
Buy these skills in order. Each row shows that skill's price; totals include the target and every earlier skill on this path.
| Step | Skill | Cost | Unlock requirement |
|---|---|---|---|
| 1 | Earth-Shakers | No upgrade currency | Obtain Earth-Shakers |
| 2 | Earth-Shakers: Charge Level | 2 Oni Stones | A Strength in Refuge |
| 3 | Earth-Shakers: Power | 5,500 Red souls | Hidden Oni power after A Strength in Refuge |
| 4 | Earth-Shakers: Charge Time | 3 Oni Stones | Final hidden Oni power |