Hunter's Teamwork
Ranger Attack 1
You use a nearby ally to gain advantage with your attack.
Ranged weapon
Target: One creature
Attack: Dexterity vs. AC
Effect: If two or more allies are adjacent to the target, you gain combat advantage against the target with the attack.
Hit: 1[W] + Dexterity modifier damage.
Increase damage to 2[W] + Dexterity modifier at 21st level.
Hunter's Teamwork is an at-will power available to rangers at the 1st level.[PHH1:MH1]