Your spirit companion dissolves into roiling black clouds that loose lightning and slashing rain.

Encounter   ✦     Implement, Lightning, Primal
Standard Action      Close burst spirit 1

Target: Each enemy in the burst

Attack: Wisdom vs. Reflex

Hit: 2d6 + Wisdom modifier lightning damage, and the target is immobilized until the end of your next turn.

Elemental Spirit: You and each ally in the burst can choose to deal lightning damage until the end of your next turn. This lightning damage replaces an attack's normal damage types.

Effect: Your spirit companion disappears.

Published in Dark Sun Campaign Setting, page(s) 93.