Random Magic Weapons (any level)

A shocking burst weapon functions as a shock weapon that also explodes with electricity upon striking a successful critical hit. The electricity does not harm the hands that hold the weapon. Shocking burst weapons deal +1d10 points of bonus electricity damage on a successful critical hit. If the weapon's critical multiplier is x3, add +2d10 points of bonus electricity damage instead, and if the multiplier is x4, add +3d10 points of bonus electricity damage. Bows, crossbows, and slings so enchanted bestow ,the electricity energy upon their ammunition.
Aura: Moderate evocation
Caster Level: 10th
Requirements: Craft Magic Arms and Armor, call lightning or lightning bolt
Price: +2 bonus
Source: Dungeon Master's Guide v.3.5