I couldn't find any nice looking stage for Shuma Gorath so I decided to make it by myself.
To make this stage I used Cybaster's tool , edited some sprites and added some simple animations. Nothing extraordinary. I think it looks nice, though.
You can grab it here.
https://www.mediafire.com/folder/j97dkr40m99rr/ShumaGorath'sStage
I'm open to feedback and suggestions. Enjoy.