Sneak attack

Once per turn, you cand deal an extra 1d6 damage to one creature you hit with an attack roll if you have advantage on the roll and the attack uses a Finesse or a Ranged weapon. The extra damage is the same as the weapon's type.
You don't need Advantage on the attack roll if at least one of your alliers is within 5 feet of the target, the ally doesn't have the incapacitated doncition, and you don't have Disadvantage on the attack roll.