* Can be used on any cave wall to make a reinforced wall.
* Can be used on any cave floor to recreate a stone pillar (wall)
* Can not be used on any cave floor to reinforce the ground for pavement. You can only collapse tiles like a [[shaker orb]]
* The spell can be cast on mine entrances to close them, including from outside, similar to a [[shaker orb]].
* Attached mine doors must be destroyed before strong wall can be cast on the entrance.