Piercing

When using a weapon with this modifier, the wielder uses their weapons damage stat (i.e. Body for Melee, Mind for Ranged, etx) to ignore the struck targets defense.
So a Character with a Body Attribute of 32 would ignore 3 defense on a target when striking with a piercing weapon.
So a Character with a Mind Attribute of 47 would ignore 4 defense on a target when striking with a piercing arrow.