Cracks Call is a direct damage spell with a range of 4D6". Trace a straight line from the base of the caster the number of inches rolled. All models in its path must pass an Initiative test to leap out of the way, or be removed as casualties with no saves except Magic Resistance allowed. Instead of taking an Initiative test, War Machines and Chariots must instead roll a 5+ or be destroyed. A building (or single section of a multi-part building) affected by the spell will collapse on a roll of 5+. If the building collapses, any models garrisoning it must pass an Initiative test, or be removed as a casualty with no armour save allowed. Any survivors are placed outside the building, as described for a unit abandoning a building. Then replace the building with an area of dangerous terrain of equal size. The caster can choose to increase the range of this spell by doubling the result of the 4D6" rolled. If they do so, the casting value is increased to 18+.