Sneak Attack

Once per turn deal extra {x} to one creature you hit with an attack if you have ADV (finesse or ranged weapon only).
You do not need ADV if another enemy of the target is within 5 feet of it, that enemy is not incapacitated and you don't have DISADV.
{x} is (CharLVL/2)RoundUp * 1d6 (lvl 1 stands for 1d6 and lvl 9 for 5d6)