The rules read,
Spike stones impede progress through an area and deal damage. Any creature moving on foot into or through the spell’s area moves at half speed. In addition, each creature moving through the area takes 1d8 points of piercing damage for each 5 feet of movement through the spiked area.
Any creature that takes damage from this spell must also succeed on a Reflex save to avoid injuries to its feet and legs.
I'm seeing some folks argue that the Reflex save is made one for the move through the area, while others argue the save is for every 5 foot square. Is there any definitive ruling on this?
