Here is my final submission:
and one with darker lighting:
In some stories depicting the Gumiho, she is caught using a stone of sorts to steal the life away from those that she exchanges it with. In one story, a child played a game with a Gumiho, passing the stone back and forth with her, slowly losing its life.
I have more shots and a 3D viewer for her on my artstation if anyone would like to check it out (https://www.artstation.com/artwork/nYl8Wr).
Hope you guys like it!