Doesn't matter if we have three subelements, gotta remember that projectkorra didn't make the show.
It doesn't choose what is canon and what is not, and from the looks of this, it is canon which gives a higher probability of it happening.
And i don't think it matters what you consider to be a subelement
@White_Knight28
As for the idea, I don't think it's really needed considering you haven't stated any use for it what so ever, just that we should have it which is a bit unnecessary unless what your aiming towards is it creating a AOE of particles to blind your opponents which i think would be cool to look at, but would it really be needed?
I mean, The air particles as is already blind players enough :3