SRD:Armor of Arrow Attraction

Armor of Arrow Attraction: Magical analysis indicates that this armor is a normal suit of ''+3 full plate. ''However, the armor is cursed. It works normally with regard to melee attacks but actually serves to attract ranged weapons. The wearer takes a –15 penalty to AC against any attack by a ranged weapon. The true nature of the armor does not reveal itself until the character is fired upon in earnest.

Strong abjuration; CL 16th; Craft Magic Arms and Armor, bestow curse; Price 9,000 gp.