The land is your ally, and at your call it rises up to smash your enemies.

Encounter   ✦     Primal
Immediate Interrupt      Area special

Trigger: An enemy within the zone created by your guarded land and marked by you makes an attack that does not include you as a target.

Target: Each enemy within the zone created by guarded land

Attack: Primary ability + 6 (9 at 21st level) vs. Fortitude

Hit: 2d10 + ability modifier damage, and you slide the target 3 squares to a square within the zone created by guarded land.

Published in Dark Sun Campaign Setting, page(s) 60.