You wait for the perfect moment to slay your foe, delivering a lethal strike when its defenses are down for but a moment.

Daily   ✦     Martial, Weapon
Standard Action      Melee or Ranged weapon

Requirement: You must be wielding a crossbow, a light blade, or a sling.

Target: One creature

Attack: Dexterity vs. AC

Hit: 7[W] + Dexterity modifier damage.

Miss: Half damage.

Special: If you have combat advantage against the target, double any extra damage from Sneak Attack or a critical hit.

Update (10/4/2011)
Updated in Class Compendium.

Published in Player's Handbook, page(s) 126, Class Compendium.