Near sight
When near sight is place on you, you can still see abilities in the fog of war. This ruins almost the whole point of you not supposed to see anything. This is especially prevalent on nocturne so if you just look, you can see his trail, showing not only where nocturne is, but your teammate as well.
I haven't played against a nocturne, but I just played as one. The ult seems to do its job to newer players (I'm lvl 11 as of this time) they were spooked as hell and panicked so uh, I guess it works? Btw quadra kill