Your fury spills over to your foe, locking the two of you in a lethal duel.

Daily   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Effect: Before the attack, if the target is marked, that condition ends on it. It can then make a melee basic attack against you as a free action.

Attack: Strength vs. AC

Hit: 7[W] + Strength modifier damage.

Miss: Half damage.

Effect: After the attack, you can allow the target to make a melee basic attack against you as a free action. If the target makes that attack, you can make a melee basic attack against it as a free action. You can repeat this effect until the target chooses not to make the attack.

Published in Player's Handbook 2, page(s) 64.