I found this great pic of a lava beast while browsing Bob's artblog "JINX THE MONKEY :: DRIP!" Looking further into his blog I noticed that Bob has a tendency to draw many oddball creatures. You can see more of his work at his official site here.
The above image was made for Roger Omar's "Elmonstruodecoloresnotieneboca, a book of childrens' dreams. " And as posted at the Drip blog, here's a link to a flickr gallery that hosts more of the artwork from this book.