As your spirit moves, it transforms into a rolling boulder that smashes through your enemies' ranks before disappearing.

Encounter   ✦     Implement, Primal, Spirit, Zone
Standard Action      Close burst spirit 1

Target: Each enemy in the burst

Attack: Wisdom vs. Fortitude

Hit: 3d8 + Wisdom modifier damage, and you knock the target prone.

Elemental Spirit: The burst creates a zone of difficult terrain that lasts until the end of the encounter or until you use call spirit companion.

Effect: Your spirit companion disappears.

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