You direct your
destructive resonance into the ground and
trigger an earthquake centered on a spot you can
see within very long range. The ground within
short range of that spot heaves and shakes for
five minutes, causing damage to structures and
terrain in the area. Buildings and terrain features
shed debris and rubble. Each round, creatures
in the area take either 3 points of damage due
to the general shaking, or 6 points of damage
if in or adjacent to a structure or terrain feature
shedding debris.