|  | # of Slots | Relevant | Check | 
|  | Required | Ability | Modifier | 
| Grade or Slope in Passage | 1 | Wisdom | +4 | 
| New Tunnel/Passage Construction | 1 | Wisdom | +4 | 
| Sliding/Shifting Walls or Rooms | 1 | Wisdom | +2 | 
| Stonework Traps, Pits, and Deadfalls | 1 | Wisdom | 0 | 
| Approximate Depth Underground | 1 | Wisdom | 0 |