After landing a decisive blow, you skillfully use your weapon to entangle your opponent.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. Reflex

Hit: 4[W] + Strength modifier damage.

  Weapon: If you're wielding a flail and you are adjacent to the target at the end of your turn, the target is restrained until the start of your next turn.

Published in Player's Handbook, page(s) 84, Class Compendium.