Your powerful blow shatters your target's defenses.

Encounter   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

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

Thaneborn Triumph: The penalty to AC equals your Charisma modifier.

Published in Player's Handbook 2, page(s) 57.