Based on an underground semi-ancient comic by Mat Brinkman called Skeleton Jelly Multiforce, which got shared a lot last decade when people were posting weird shit, which is how I discovered it.
I just learned he did concept art for Midnight Gospel, which definitely connects a dot for me.
Nice!
(I did however check if Mat Brinkman did any concept art on Powerpuff girls before realising what you were saying/inkposting :))
Sorry for the mischief, the page is getting pretty crowded!