I have looked through the books, and maybe I am missing this but what if someone, say a Rogue, manages to make a stealth check to the point where they are invisible from a creature. Now, I have seen that to hit the creature would take a penalty to rolls, etc., but what would be the case if the character is able to attack from being completely invisible? For example, while combat is going on one side of an alley, a Rogue manages to sneak over a rooftop, and go down it without a characters also hiding. Now the rogue notices him but he does not notice the Rogue. If the rogue can manage to stealth down from the roof (say 10') without the creature noticing what kind of advantage would this attack give him? There has to be some sort of advantage to this. (TL;DR) What bonuses does a character gain from attacking from stealth/invisible? edit: derp formatting