A fan art tribute to the insanely great Neil Gaiman/Terry Pratchett comic novel of the Apocalypse Good Omens. Awesome!
To add to the already over-the-top coolness factor, it was inked by Matt Howarth, of Savage Henry fame.
If you haven't read Good Omens, by all means do so immediately. Try to imagine the Book of Revelations by way of The Hitchhiker's Guide to the Galaxy filtered through one of the '70s crop of satanic horror films. Sheer delight!