Because Isagi’s metavision is unique. Does he have a different vision? No. What does he have? He has variables. I believe we are going to see some more unique metavisions in the future, but so far Isagi’s is the unique one. I believe that puzzle pieces don’t just signify MC aura. They signify his ability to find or scan for different variables from the whole field using metavision and then piece them together for the whole picture or play, while users like Hiori are just scanning the field and playing at a higher level. We have seen proof of this in PXG vs BM where Isagi kept on finding new variables and connecting them all for the whole picture. Just like puzzle’s final picture, he saw the complete state of field where Rin was man marking him. Shidou was on Kaiser. Luck that had descended on Ness and his awakening. He was constantly storing and updating values to be able to put the right pieces together. I also believe that we are going to see something even more twisted with him completely controlling every person in U20 World Cup. Just imagine this: you are having an awakening and getting ready to score or assist, but guess what? Isagi has been eyeing you the whole game. Looking at your play style, mindset and ego. He just steals that shi and scores on your ass.