Publication:Grim-N-Gritty/Appendix 5/Iron Claw (3.5e Power)

If you have a claw attack (either from an actual natural weapon or from an effect such as claws of the beast) or a bite attack (which could be a natural bite attack or one you gain by means of the power bite of the wolf ), you can use this power to make one of your natural weapons armor piercing.