Reaper make several Cthuloid monsters in the Bones material, such as this one:

77113: Eldritch Demon (50mm base) aka Cthulhu

Again, simple drybrushing on black undercoat. No washes or advanced techniques.

This is practice for the big one…Ph’ngui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn