Dastard: This armor property only works for evil creatures with the challenge ability (such as cavaliers) or the smite good ability (such as antipaladins, half-fiends, and creatures with the fiendish creature template). When worn by such a creature that uses a challenge or smite ability, the wearer gains a +2 profane bonus to AC against attacks from the chosen opponent.
Aura Faint abjuration; CL 5th; Craft Magic Arms and Armor, protection from evil or protection from good; Price +1 bonus.