Your powerful strike breaks through your foe's slow defenses like a dagger through parchment, leaving it reeling.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. Reflex

Hit: 4[W] + Strength modifier damage, and the target takes a -2 penalty to AC until the end of your next turn.

Published in Player's Handbook, page(s) 85, Class Compendium.