As your attack hits, you channel the spirit of the thunder ram to knock your foe and its companions away from you.

Encounter   ✦     Primal, Thunder, Weapon
Standard Action      Melee weapon

Primary Target: One creature

Primary Attack: Strength vs. AC

Hit: 1[W] + Strength modifier thunder damage. Make a secondary attack that is a close blast 3.

  Earthstrength: You also push the primary target a number of squares equal to your Constitution modifier.

  Secondary Target: Each creature in the blast

  Secondary Attack: Strength vs. Fortitude

  Hit: 1d6 thunder damage, and you push the secondary target 1 square.

Published in Player's Handbook 2, page(s) 155.