Magic Weapon Abilities - Sonic Burst
A sonic burst weapon functions as a sonic weapon that also explodes with sonic energy upon striking a successful critical hit. If the weapon normally has a x2 critical multiplier, add an extra 1d8 points of sonic damage each time you successfully score a critical hit. For weapons with a x3 multiplier, add 2d8 points of sonic damage; for a x4 multiplier, add 3d8 points of sonic damage. Bows, crossbows, and slings so crafted bestow the sonic energy upon their ammunition. This effect activates even if the creature struck is not subject to critical hits (roll to see if a critical hit occurs, then apply the extra damage if appropriate). Even if the sonic ability is not active, the weapon still deals its extra sonic damage on a successful critical hit.
Aura: Strong evocation
Caster Level: 12th
Requirements: Craft Magic Arms and Armor, sound burst
Price: +2 bonus