Or is that Diablo Azul? Sounds more menacing in Spanish, doesn't it?
This is another one of those drawings with a really long gestation period. I first dabbled around with it about two years ago. I couldn't get it to work and got frustrated with it, so I shelved it and went on to other things. I found it in a folder this week and decided to give it another go.
I was trying to make it look like he's being lit with a reddish light from below (because all evil characters are lit that way, dontcha know). I'm not sure it's working very well. I'm starting to see why some artists use models to get the lighting right, rather than trying to eyeball it.
The background is more painterly than usual too, to contrast with the cartoony devil.
Drawn in Photoshop on the graphic tablet.
Here's the original digital sketch (sans trident).