With a furious blow, you give your foe a painful reminder of the threat you pose, singling it out for wrath if it disregards you.

Encounter   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 4[W] + Strength modifier damage. Until the end of your next turn, the target is marked, and it provokes an opportunity attack from you if it makes an attack that does not include you as a target.

Published in Player's Handbook 2, page(s) 163.