The Belker is yet another monster that I never paid very much attention to, just kinda going 'ehhh' whenever I came to it's entry and moving on to fire horses and other more traditionally cool monsters. I finally got around to actually reading its entry and I realized, holy canoli, this fella is hella horrifying. You know Scratchtasia? That Itchy and Scratchy version of Fantasia where Scratchy chops up Itchy into powder, then accidentally breathes him in, and then a million microscopic Itchies hack him to pieces from the inside? That's essentially what a Belker can do to you.
These creatures are air elementals assossiated with the more smokey aspects of air. They appear as vaporous devils, though they can turn into actual clouds of smog that can either casually float away or do the earlier mentioned shenanigans to your respiratory system.