You easily duck under your foe's defenses to deliver a crippling attack.

Encounter   ✦     Beast Form, Implement, Primal
Standard Action      Melee touch

Effect: Before and after the attack, you shift 2 squares.

Target: One creature

Attack: Wisdom vs. Reflex

Hit: 2d10 + Wisdom modifier damage, and the target cannot shift until the end of your next turn.

Published in Player's Handbook 2, page(s) 92.