You create a small whirlwind that buffets creatures and knocks them off their feet.

Encounter   ✦     Arcane, Implement
Standard Action      Area burst 1 within 10 squares

Target: Each creature in the burst

  Storm Magic: You can choose not to target a creature in the origin square of the burst.

Attack: Charisma vs. Fortitude

Hit: 1d10 + Charisma modifier damage, and you knock the target prone.

Published in Arcane Power, page(s) 29.