'Mixed' breathing?
Did he mix several skills and give them lol?
[The One Who Revels in Chaos]
Spoiler!
I'm a good boi 
Comment by Eden Gremory on Nano Machine - Chapter 70
2 Replies
@Eden Gremory Dunno if you know it by now, but I think it's the breathing techinque that was written on the glowing stone in the cave.
@YuriLovingCookie bruhhh just came back after starting the next chapter just to find out
Spoiler!
that the breathing technique was craeted by nano haha