A pattern of lightning bolts adorns this fine, blue linen tunic.

A lightning tunic allows you to punish attackers with crackling electricity. This tunic has 3 charges, which are renewed each day at dawn. Spending 1 or more charges creates an electrical field around your body, which deals electricity damage to anyone striking you with a natural attack or nonreach melee weapon. This effect lasts for 3 rounds once activated, and it does not harm you or your gear.
1 charge: 2d6 points of electricity damage.
2 charges: 3d6 points of electricity damage.
3 charges: 4d6 points of electricity damage.

Prerequisites: Craft Wondrous Item, shocking grasp.
Cost to Create: 4,000 gp, 320 XP, 8 days.