maybe invent a breathing method like shira
But on top of all that, what had caught Shinji's eye was another thing. The Eight Gates technique. Of course, he made sure to not have his greed show outwardly and didn't know the exact side effects of the technique. But Shinji wanted to learn the technique, it wasn't a matter of whether it was useful or not either, but as a Jutsu enthusiast, a technique like that was fascinating. He had never seen something like it before, maybe the Body Flicker, but that worked under completely different rules.
Anime & Comics · MessyLife
+1
I, Your Father, Carry a Big Stick
Anime & Comics · Einlion