I have seen this picture before as well when I was browsing the Internet. If you look closely at the bottom left it says, "Mock game cover design by Michael Yazijian." It also displays his site www.yazstudios.com I have seen the site(it's down now) and he had some pretty amazing drawings/paintings he had created.
Michael Yazijian has also done some movie jobs:
The Chronicles of Narnia : The Lion, the Witch and the Wardrobe (2005)
Ice Princess (2005)
Flight of the Phoenix (2004)
The Chronicles of Riddick (2004)
The Day After Tomorrow (2004)
Scooby Doo 2: Monsters Unleashed (2004)
Ratchet and Clank: Going Commando (2003)
Ratchet and Clank (2002)
"Xcalibur" (2001)
Michael Yazijian has also done some movie jobs:
The Chronicles of Narnia : The Lion, the Witch and the Wardrobe (2005)
Ice Princess (2005)
Flight of the Phoenix (2004)
The Chronicles of Riddick (2004)
The Day After Tomorrow (2004)
Scooby Doo 2: Monsters Unleashed (2004)
Ratchet and Clank: Going Commando (2003)
Ratchet and Clank (2002)
"Xcalibur" (2001)
Take a look at this site:
http://www.creatures-imaginaires.com/03_expos/dossier_artistes/yaz/yaz_portfolio_3.htm
If you click on the picture named "Druid" and look at the picture closely at the bottom left it says, "Diablo 2 Expansion Pack Druid"