Silent Strike (4e Power)

Silent Strike	Ghost Warrior Attack 1
You manage to get behind your foe with out them noticing before you strike
At-Will Shadow, Weapon
Standard Action	Ranged Weapon
Target: One Creature
Attack: Constitution Vs. AC
Hit: 1[W] + Constitution Modifier damage and the target grants combat advantage to you until the end of your next turn. Augment 1 Before the attack you shift 1 square Augment 2 Before the attack you shift a number of squares equal to your Wisdom modifier, and the target takes 5 extra damage from the next attack against it.