Rogue Attack 3Defender's Cohort
Another warrior’s vigilance is all you need to find the soft spot in your enemy’s defenses.
Encounter Martial, Rattling, Weapon
Standard Action Melee weapon
Requirement: You must be wielding a light blade.
Target: One creature
Attack: Dexterity vs. AC
Hit: 2[W] + Dexterity modifier damage. If the target is marked by an ally of yours, the attack deals extra damage equal to your Charisma modifier.
Published in Martial Power, page(s) 75.