Dedas said:
That spell is very good when playing MA Ulm. One out of ten smiths have a chance of casting it.
One out of ten smiths have 25% chance of being able to cast it, which is considerably worse. Still, Ulm will get access to it, even though it will probably take a long while.
There might be a avoidance roll involved, like with earthquake. Not sure, but I think there was such an avoidance with falling frost once. Not sure if there still is. Possibly affected by shields.