The thunder of your steps batters your foe.

At-Will   ✦     Arcane, Implement, Thunder
Standard Action      Ranged 10

Target: One creature

Attack: Charisma vs. Fortitude

Hit: 1d8 + Charisma modifier thunder damage.
Level 21: 2d8 + Charisma modifier thunder damage.

Effect: Before or after the attack, you shift 1 square.

Published in Player's Handbook 2, page(s) 139.