@ 2006 White Wolf
Be sure to click to enlarge for lots more detail!
I had forgotten about this one until recently, and just found it while I was poking through an old folder. It's from about five years back, and it's the cover for a White Wolf RPG book called "Mage: Legacies 2: the Ancient". I know, one too many colons there... Well, I'm sure it's a fine book anyway.
This had to depict lots of stuff: the three distinct and VERY specific mages, the central standing stone, the way they were standing around it, and the creatures they were fighting. The Australian guy in the middle was the most difficult, as I recall - I had to figure out how to make it look like he was using cave paintings that come to life to fight with.