What does "unaware" means in backstab?
Talent "Backstab" reads as follows:
You know how to strike swiftly and quietly. If you make an Attack with a Subtle weapon and the target is unaware of you, the attack deals double Damage and ignores Armour.
Does is mean that it can be done pretty much only once per combat (Because every time you try it next, enemies know you exist, but don't know where you are) or can it be done every time I'm hidden again?