Killer's AmbushRogue Attack 7
Your enemy doesn't see you until it's too late, and by then, you've left it a gaping wound to remember you by.
Encounter ✦ Martial, Rattling, Weapon
Standard Action Melee or Ranged weapon
Requirement: You must be wielding a crossbow, a light blade, or a sling.
Target: One creature from which you are hidden
Attack: Dexterity vs. AC
Hit: 3[W] + Dexterity modifier damage. You shift 1 square.
Cunning Sneak: You shift a number of squares equal to your Intelligence modifier, and you can make a Stealth check to become hidden.
Published in Martial Power 2, page(s) 62.