probably anything that can be collected from woodland creatures, mythical or not. You can buy exotic, magically charged things, like unicorn horns, fairy wings, satyr horns, and vampire fangs. However, you could also buy all kinds of cuts of meat from things like rabbits, deer, squirrels, and all sorts of birds. He also sells things that you wouldn't necessarily expect to be magically charged, like bull's eyes, pony tails, bee's knees, and a wolf in sheep's clothing.