i also like duel-wielding :P. actually assasin is a sneaky class.it attacks without get noticed and that is why it can be invisible.so if it had only one knife what was going to be the other weapon??it could not be shield because he need to be and quick.if it was empty the other hand it will not be helpfull because less knives=less damage.so now we have the assasin with duek-wielding
