Satana by Jason Pearson.
Jason’s having a bit of a rough patch right now; if you’re in a position to buy some original art from him I hope you can do so.
Edited to add: The link takes you to a site where art by him is for sale, most of which is via his official agent, Albert Moy. Here’s a direct link to Moy’s Pearson page, if you prefer to go that way.
And once again: Apparently Mr. Pearson has more than one representative when it comes to art sales! Try this one as well.