That would make a great Mi-Go (
...whenever those rules are available...
) or could be used as a great Shambler. Fantastic sculpts...really gooey...
Agree about the gooey & the excellence of the mini. Super-duper game potential.
But as for what it is, I'm pretty sure it's a very small Shoggoth
disguised as a Mi-Go. Very stealty, very stretchy, but not likely to fly.
The Mi-Go do like to play dress-up, maybe ol'shoggy has learned a trick or two?