© 2005 Fantasy Flight Games
This one's from 2005, and Fantasy Flight Game's Call of Cthulhu CCG. It's an aspect of Nyarathotep in one of his more inhuman and unknowable guises... perhaps even his natural state?
This was a last-minute addition to the set, so they called me in to do it fast, and it ended up being used for box art and also on the CoC web site as the top banner for a couple of years.
I've gotten a lot of these quick turnaround jobs over the years!