-How the technique is performed. (which is basic for all techniques) I gather my chakra and perform a single handseal, releasing my chakra while directing it over to my target. I inject my chakra in the targets chakra system, causing a disturbance in their usual flow of chakra. Now that my chakra has infiltrated their system, i am able to make them see illusions. With my chakra, i focus it on their eye and make their sight completely black. Black everywhere, they wouldn't be able to see anything.
-What senses the genjutsu affects and how it affects them? Sight only, but like you said the sight effect is so advance. I cannot believe its not S-rank. Okay this affects the sight sense simply because it makes them see nothing. It makes them lose one sense, which is really an advantage. They wouldn't see anything at all, because the world around them would turn pitch black.
-How the genjutsu creates an opening for the attack. This creates a huge opening because the user will not be able to see where you or your attacks will come from. If they cannot see where you or your attacks are, then they cannot hit you. You can also use this as an opening for an attack by positioning yourself in the terrain in a different spot, so that when they break out of the illusion, they wouldn't find you at your usual spot.
-In what situations would use it, if you would use it at all. Provide reasoning. I would use this, of course. I would use it in 2v2 spars if possible, because it affects two people. If its 1v1, i would use this technique and create a clone, where one will hide and the real one stays. Since they won't know which one's which, i would be able to perform surprise attacks and techniques like those.
-What senses the genjutsu affects and how it affects them? Sight only, but like you said the sight effect is so advance. I cannot believe its not S-rank. Okay this affects the sight sense simply because it makes them see nothing. It makes them lose one sense, which is really an advantage. They wouldn't see anything at all, because the world around them would turn pitch black.
-How the genjutsu creates an opening for the attack. This creates a huge opening because the user will not be able to see where you or your attacks will come from. If they cannot see where you or your attacks are, then they cannot hit you. You can also use this as an opening for an attack by positioning yourself in the terrain in a different spot, so that when they break out of the illusion, they wouldn't find you at your usual spot.
-In what situations would use it, if you would use it at all. Provide reasoning. I would use this, of course. I would use it in 2v2 spars if possible, because it affects two people. If its 1v1, i would use this technique and create a clone, where one will hide and the real one stays. Since they won't know which one's which, i would be able to perform surprise attacks and techniques like those.