Sneak Attack: Once per turn, the thief can deal 10 (3d6) extra damage to one creature he hits with an attack if he has advantage on the attack roll. He doesn't need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn't incapacitated, and he doesn't have disadvantage on the attack roll.   Cunning Action: Due to it high agility and cunning he can use a bonus action to take the Dash, Disengage or Hide action.   Tool Proficiency: proficient with the Thieves' Tools.