This will be a chapter about Granger!
The illustration was inspired by the Ancient Egyptian myth. According to the myth, in the afterlife, your heart/soul is weighed against a feather. If it's heavier (meaning more evil) than the feather, then it will be devoured by a monster.
Incidentally, I've known what this image will be for a long time. For the earlier chapters, I've invented most of the title-page visual metaphors on the same days I drew them, but for this one and the next one, I've known since before I drew the first page.