Oh, that's frickin' cool! I love how you illustrated the differences between Faeron's and Mischief's versions of it. The black fangs give me a spider-y vibe, though I know that's not what spider fangs look like. And the black goo dripping from his temporary talons is just another great creepy touch.
I haven't tried or much looked at the Pact of the Tome yet. I need to study it more. Also, your artworks have made me much more interested in changelings now, just wanted you to know.