As the tree falls and crushes all beneath it, your weapon smashes down to knock your foe off its feet.

Encounter   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. Reflex

Hit: 2[W] + Strength modifier damage, and you knock the target prone.

Published in Player's Handbook 2, page(s) 169.