This copper ring occasionally emits tiny sparks.

A ring of mystic lightning provides a boost to your electricity-based spells. When casting spells with the electricity descriptor, you gain a +1 competence bonus to caster level. This is a continuous effect and requires no activation.
In addition, this ring has 3 charges, which are renewed each day at dawn. Spending 1 or more charges grants a bonus to the damage dealt by the next electricity spell you cast before the end of your turn. (If the spell doesn’t normally deal electricity damage, this expenditure has no effect).
1 charge: +2d6 electricity damage.
2 charges: +3d6 electricity damage.
3 charges: +4d6 electricity damage.

Prerequisites: Forge Ring, call lightning or lightning bolt.
Cost to Create: 3,500 gp (plus 500 gp for base item), 280 XP, 7 days.