A Resource Pack for The Things We Leave Behind From the introduction: The Mark of Evil is a collection of ephemera aimed at assisting Keepers in collating and organizing all the play aids from the main book and all the images therein. It will enable Keepers to print off necessary parts for their coming sessions without having to edit a page from the PDF of The Things We Leave Behind or bend the pages of their book. Alongside this are a collection of oddities such as forms, images, and play aids that have no connection to any scenarios in the book but an enterprising Keeper may be able to craft their own scenarios from the varied and peculiar items.