You deal crippling blows to two different adversaries.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One or two creatures

Attack: Strength vs. AC (main weapon and off-hand weapon), two attacks

Hit: 1[W] + Strength modifier damage per attack, and the target is slowed until the end of your next turn.
    If the target is a demon, it takes 2[W] + Strength modifier damage per attack, and it is immobilized until the end of your next turn.

Published in Forgotten Realms Player's Guide, page(s) 58.