As with other digital Card Battle Games, Rage of Bahamut features characters that "level up" both in terms of gameplay and visually, as you progress.
"Treebender" is an example of the leveled-up version. It's the progression of the dragon discussed last week, although as mentioned that dragon appears different in-game as well due to the digital finish and the post-hoc background added in. And, to further confuse the matter, "Treebender" does not appear in-full within the game, which uses a vertical crop. Probably a little more than a third of the image on the sides is cropped off.
To give you a further idea of how fluid things are in my studio, the canvas on which this was painted has its own story. For a couple of years, it's lived on my shelves with just a sky painted on it. I used a portion of it (and not even the part which is visible here anymore, to avoid copyright issues) in another illustration. At one point, I had worked up a digital study for an illustration I intended to do based on a short story by Nathaniel Hawthorne (!) of all people. It wasn't a client-piece, but simply something I wanted to paint. For various reasons that I shan't get into here (as this story is convoluted enough, already), I was not able to proceed with that painting, but the sky canvas remained. Finally, in putting together this piece, I was able to bring it out and use it for something. Whew.