Demonic Assistants I caught the other day. But thanks for bringing it to my attention! Copied and pasted from the code to provide you the full text: "Casting this spell gives an instant 10% chance that your Spell Points drop to zero. If that doesn't happen, you'll have a 50% chance to regain 1 Spell Point each turn for the next 60 turns. Casting it angers Good gods."
Reality Breakdown - shoot. And interesting. I get why the scenario would be problematic, but if the walls can't wander onto Mine Tracks, then how did they block the Mine Tracks in the first place? As far as I recall they should only be allowed to wander into Empty Space, so shouldn't have gotten onto those tracks or water in the first place. Thanks for bringing this to my attention, I'll look into it immediately!