By attacking your comrade, your adversary has called down your righteous ire.

Encounter   ✦     Martial, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC. If the target attacked you or an ally since the end of your last turn, you gain a +2 bonus to the attack roll.

Hit: 2[W] + Strength modifier damage.

  Weapon: If you're wielding a mace or a pick, the attack deals extra damage equal to your Constitution modifier.

Special: When making an opportunity attack, you can use this power in place of a melee basic attack.

Published in Martial Power, page(s) 14.