When cast, this spell damaged artificial structures with rapid erosion. The spell also affected constructs but had no effect on creatures. The amount of damage caused by the erosion as well as the size of the structure the spell could target was determined by the caster's spell level.
- Crumble article at the NWNWiki, a wiki for the Neverwinter Nights games.
- Crumble article at the NWN2Wiki, a wiki for the Neverwinter Nights 2 games.