I absolutely adore the shirt design. The contrast between smooth material and an almost Celtic, elven design woven around it and even overlapping it is amazing. Did you come up with it yourself? If so, kudos. I think I love your brain.
I also love the contrast between the colors, and detail and simplicity. I am really interested in this book and I'm desperately trying to think if I have any story ideas that I could some day get you to paint the cover for.
The decay in this image is tantalizing. I suspect it's caused by the magic, which makes it all the better because my preference is for magic to be life energy. So there's even more delicious contrast.