Infiltrator

You have become a master of sneaking into well guarded places. 

Your dexterity becomes 20.

As an action you may try to distract a creature you are not in combat with for one round by throwing any tiny object. (At dm’s disgression you may distract in other ways). A creature distracted in this way has a -10 to perception to notice you  and up to three other creatures of medium size or lower.To do so roll a d20+dex+expertise. On a natural 1 the creature is distracted for 2 rounds, on a natural one the creature will become suspicious will try to locate you.

You can hide in half cover as if it is full cover.