Sunder Structure

Arcane 4	Type: blast, elemental (earth)
Range: touch	Duration: instantaneous

Sunder Structure

Spell — see Magic and Spells for the rules and the Spell Index for the full list.

The spell can obliterate a target structure such as a bridge, cliff, tower, or wall. The caster must make a melee attack throw against the structure’s AC (typically 2 for wooden and 6 for stone structures) using a staff or similar weapon. If the attack throw succeeds, the target structure is instantly dealt 250 extraordinary seismic structural damage to stone (enough to destroy one story of a tower or a 30’ length of wall) or 1,250 extraordinary seismic structural damage to wood. Structures with multiple stories have a separate shp per story, and each story must be breached or destroyed separately; destroying a lower story will destroy all upper stories, however. If the target structure is destroyed, each creature on or within it must make a Blast saving throw. If the save fails, the creature suffers 5d6 extraordinary bludgeoning damage from collapsing rubble. If the save succeeds, the creature suffers half that damage.

A structure may get a save

The spell’s build prices in a saving throw for half damage, though nothing in the text above says who would make it. The Judge may allow a first responder — a structural engineer, a guard on the wall, an alert stronghold owner — to make the saving throw on the structure’s behalf, halving the damage dealt. Expect no save where a structure stands unattended or its defenders are unaware.