This jutsu is approved. Kakashi< I would love to say you can however you don't have the chakra level...sorry. But as for not being able to copy peoples signitures...well that would depend on a number of things and The admins would say if you could or not. For instance the chidori is simply gathering lightning charkra, that can be copied and the rasangan is just spiral chakra in one's hand. Anyone who meets the criteria can do these with the proper training. Which leads me to another point. All Jutsu must be trained for. If you all of a sudden have a new jutsu, and don't tell us when you learned it or if you have not taken the amount of time nessecary to learn, you will not be able to preform it. And in a fight, If you try and pull it off, the admins will not allow it and your opponent will get another trun. So try crap like "Instant learning" and you will most likely be killed in a fight.