This assassin\'s autoskill indicate their ability to hide really well. Well this is not another hide-skill, but when it is succesful, it could make several things. First is, that you can evade attack of some aggresive mobs, that wanna attack you. Than when you backstab, if you are succesful, enemy will notice you far later, so you have small advantage. They say, that when your enemy is more wise and experienced than you, he can see through this skill.