Hellpiercer

Book of Exalted Deeds
James Wyatt, Christopher Perkins, Darrin Drader

Tested in battle against the fiendish legions of Hell, this colorful +3 shocking burst arrow or +3 shocking burst bolt is treated as a Silvered Weapon for the purpose of overcoming damage reduction. Furthermore, the head of the arrow or bolt contains a tiny reservoir of purified couatl venom. This ravage harms only evil creatures, including outsiders that are normally immune to poison (such as devils).

Moderate evocation and transmutation; CL 11th; Craft Magic Arms and Armor, Silvered Weapon; Price 4,007 gp per arrow or bolt; Cost to Create 2,007 gp + 40 XP per arrow or bolt.