You know how to put armor spikes to defensive use by thrusting them into the path of an oncoming attack just in time.
Prerequisite(s): Proficiency with armor spikes.
Benefit(s): If you are wearing armor spikes, as an immediate action when you take damage from a non-magical attack, you can give your armor spikes the broken condition to reduce the amount of damage you take by 5. If your armor spikes are already broken, they are destroyed when you take the damage. If you are wearing masterwork armor spikes, you instead reduce the damage taken by 10.
Pathfinder Player Companion: Magical Marketplace © 2013, Paizo Publishing, LLC; Authors: John Ling, Ron Lundeen, Patrick Renie, David Schwartz, and Jerome Virnich.