Sunder Structure
Spell — see Magic and Spellcasting for the rules and the Spell Index for the full list.
Arcane 4 Type: blast, elemental (earth)
Range: touch Duration: instantaneous
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 bludgeoning damage from collapsing rubble. If the save succeeds, the creature suffers half that damage.