You lash out with your weapon, slamming your foe again and again until you drive it into the ground.

At-Will   ✦     Augmentable, Psionic, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Constitution vs. AC. Make the attack three times.

Hit: Constitution modifier damage.

Effect: If you hit the target two or more times, it falls prone.

Augment 1

Attack: Constitution vs. AC. Make the attack four times.

Augment 4

Attack: Constitution vs. AC. Make the attack four times.

Hit: Constitution modifier + Charisma modifier damage.

Published in Player's Handbook 3, page(s) 50.