A thundering weapon creates a cacophonous roar like thunder upon striking a successful critical hit. The sonic energy does not harm the wielder. A thundering weapon deals an extra 1d8 points of sonic damage on a successful critical hit. If the weapon’s critical multiplier is ×3, add an extra 2d8 points of sonic damage instead, and if the multiplier is ×4, add an extra 3d8 points of sonic damage.
Bows, crossbows, and slings so crafted bestow the sonic energy upon their ammunition. Subjects dealt a critical hit by a thundering weapon must make a DC 14 Fortitude save or be deafened permanently.
Prerequisites: Craft Magic Arms and Armor, blindness/deafness.
Cost to Create: Varies.
Source: Dungeon Master’s Guide, page 225.